NEET Biology Principle Of Inheritance And Variation Question Bank

done Sex Linked Inheritance Total Questions - 86

• question_answer1)
  A colour blind man marries the daughter of a colour blind person. Then in their progeny [AIIMS 1983, 92; CBSE PMT 1988; MP PMT 1994]
  A)
  None of their daughters are colour blind done clear
  B)
  All the sons are colour blind done clear
  C)
  All the daughters are colour blind done clear
  D)
  Half of their sons are colour blind done clear
  View Solution play_arrow

• question_answer2)
  Given is : X is the chromosome with gene for haemophilia and X is the chromosome with normal gene. Which of the following individuals will act as carrier for haemophilia [MP PMT 1992]
  A)
  \[{{X}^{h}}Y\] done clear
  B)
  \[X\text{ }Y\] done clear
  C)
  \[{{X}^{h}}{{X}^{h}}\] done clear
  D)
  \[{{X}^{h}}X\] done clear
  View Solution play_arrow

• question_answer3)
  Colour blindness is found more in males than in females because [MP PMT 1992]
  A)
  The males containing the single affected X chromosome are colour blind done clear
  B)
  Heterozygous females are colour blind done clear
  C)
  Males having affected Y chromosome are colour blind done clear
  D)
  Affected X chromosome has much high affinity to Y chromosome as compared to unaffected X chromosome done clear
  View Solution play_arrow

• question_answer4)
  Sex-linked characters are[DPMT 1985; CPMT 1980, 86, 93]
  A)
  Dominant done clear
  B)
  Recessive done clear
  C)
  Lethal done clear
  D)
  Not inherited done clear
  View Solution play_arrow

• question_answer5)
  Which one is a sex-linked disease  [CPMT 1971, 74, 75, 80; DPMT 1985;  BHU 1985; AFMC 1996]
  A)
  Tylosis done clear
  B)
  Beri-beri done clear
  C)
  Colour blindness done clear
  D)
  Albinism done clear
  View Solution play_arrow

• question_answer6)
  If mother is a carrier for colour blindness and father is normal, then in the offsprings this disease may be seen in [CPMT 1992; DPMT 1993; CBSE PMT 1999]
  A)
  All the sons done clear
  B)
  All the daughters done clear
  C)
  50% sons and 50% daughters (carrier) done clear
  D)
  All the sons and not in daughters done clear
  View Solution play_arrow

• question_answer7)
  Which one is the sex linked trait [BHU 1984, 86; CPMT 1978, 87, 90]
  A)
  Myxoedema done clear
  B)
  Diabetes done clear
  C)
  Blindness done clear
  D)
  Haemophilia done clear
  View Solution play_arrow

• question_answer8)
  Haemophilic female marries normal male, the theoretical ratio of their offsprings regarding haemophilia will be [CPMT 2005]
  A)
  All offsprings are haemophilic done clear
  B)
  All girls are haemophilic done clear
  C)
  All sons are haemophilic done clear
  D)
  Half daughters and half sons are haemophilic done clear
  View Solution play_arrow

• question_answer9)
  If a colour blind lady marries a normal man, their children will be [BHU 1986;  CBSE PMT 1994, 99; MP PMT 2000, 05]
  A)
  Normal daughters and normal sons done clear
  B)
  Normal sons and carrier daughters done clear
  C)
  Colour blind sons and carrier daughters done clear
  D)
  Colour blind sons and colour blind daughters done clear
  View Solution play_arrow

• question_answer10)
  Which one is a hereditary trait [CPMT 1981]
  A)
  Night blindness done clear
  B)
  Baldness done clear
  C)
  Colour blindness done clear
  D)
  Beri-beri done clear
  View Solution play_arrow

• question_answer11)
  The character of organisms is said to be sex linked when its gene is carried on [CPMT 1982]
  A)
  Y chromosomes done clear
  B)
  X chromosome of male or female done clear
  C)
  X and Y chromosomes done clear
  D)
  A particular autosome done clear
  View Solution play_arrow

• question_answer12)
  The tendency of genes to remain together during the process of inheritance is known as
  A)
  Sex linkage done clear
  B)
  Linkage done clear
  C)
  Differential inheritance done clear
  D)
  Optional linkage done clear
  View Solution play_arrow

• question_answer13)
  The traits controlled by the genes located on X chromosome of human beings are said to be[CPMT 1981; AFMC 1985]
  A)
  Sex linked done clear
  B)
  Sex influenced done clear
  C)
  Sex limited done clear
  D)
  None of these done clear
  View Solution play_arrow

• question_answer14)
  When linked characters or genes are inherited together through two or more generations, it is called [BHU 1985]
  A)
  Complete linkage done clear
  B)
  Continuous linkage done clear
  C)
  Incomplete linkage done clear
  D)
  Consistant linkage done clear
  View Solution play_arrow

• question_answer15)
  Person whose father is colourblind marries a lady whose mother is daughter of a colourblind man. Their children will be [CPMT 1984; DPMT 1993]
  A)
  All normal done clear
  B)
  All colour blind done clear
  C)
  All sons colour blind done clear
  D)
  Some sons normal and some colour blind done clear
  View Solution play_arrow

• question_answer16)
  A man who carries a sex linked gene on his `Y' chromosome will transmit this gene to [NCERT 1977]
  A)
  Half of his sons done clear
  B)
  Half of his daughters done clear
  C)
  All his sons done clear
  D)
  All his daughters done clear
  View Solution play_arrow

• question_answer17)
  The expression of genes for the production of milk in only females is a [AIIMS 1993]
  A)
  X linked character done clear
  B)
  Y linked character done clear
  C)
  Sex limited genes done clear
  D)
  Sex influenced genes done clear
  View Solution play_arrow

• question_answer18)
  Sex linked characters have one distinct feature [Wardha 2005]
  A)
  Always follows criss-cross inheritance done clear
  B)
  Never follow criss-cross inheritance done clear
  C)
  May be present on Y-chromosome done clear
  D)
  Only present on X-chromosome done clear
  View Solution play_arrow

• question_answer19)
  Which of the following diseases belongs to the same category as colourblindness in man [DPMT 1986; AIEEE 2003; BHU 2005]
  A)
  Nightblindness done clear
  B)
  Presbyopia done clear
  C)
  Diabetes incipidus done clear
  D)
  Haemophilia done clear
  View Solution play_arrow

• question_answer20)
  Doctor's son [CPMT 1972]
  A)
  Will always be a doctor done clear
  B)
  Will never be a doctor done clear
  C)
  Can be a doctor done clear
  D)
  Will not be a doctor at all done clear
  View Solution play_arrow

• question_answer21)
  Which of the following human diseases provides an example of sex linked inheritance [AFMC 1985; CPMT 1975, 78, 82, 91; MP PMT 1994]
  A)
  Haemophilia done clear
  B)
  Nightblindness done clear
  C)
  Mongolism done clear
  D)
  Beri-beri done clear
  View Solution play_arrow

• question_answer22)
  A man known to be victim of haemophilia marries a normal woman whose father was known to be a bleeder. Then it is  expected that [AIIMS 1985; Pb. PMT 1999; CBSE PMT 2000]
  A)
  All their children will be bleeders done clear
  B)
  Half of their children will be bleeders done clear
  C)
  One fourth of their children will be bleeders done clear
  D)
  None of their children will be bleeder done clear
  View Solution play_arrow

• question_answer23)
  Genes of colour blindness are carried in [BHU 1985]
  A)
  Eye cells done clear
  B)
  Sex cells done clear
  C)
  Body cells done clear
  D)
  Heterosomes done clear
  View Solution play_arrow

• question_answer24)
  All sons of a couple are colourblind because [CPMT 1980]
  A)
  Mother is homozygous colourblind done clear
  B)
  Mother is heterozygous and father normal done clear
  C)
  Mother is heterozygous and father colourblind done clear
  D)
  Mother is normal and father colourblind done clear
  View Solution play_arrow

• question_answer25)
  Colour blindness in man is [NCERT 1976, 79]
  A)
  Due of deficiency of vitamin A done clear
  B)
  Due of absence of visual purple in retina done clear
  C)
  Due to absence of rods in retina done clear
  D)
  A sex linked abnormality done clear
  View Solution play_arrow

• question_answer26)
  Colour blindness is a disease usually affecting man but the factor for it is transmitted to the children always by woman. This is because particular factor is located on [CPMT 1979]
  A)
  X chromosome done clear
  B)
  Y chromosome done clear
  C)
  Both X and Y chromosomes done clear
  D)
  Autosome done clear
  View Solution play_arrow

• question_answer27)
  Red green colour blindness appears due to  [CPMT 1971; DPMT 1982]
  A)
  Excessive drinking of alcohol done clear
  B)
  Inheritance through X chromosome done clear
  C)
  Over activity of adrenal done clear
  D)
  Vitamin A deficiency done clear
  View Solution play_arrow

• question_answer28)
  Which one is ineffective against antibiotics [NCERT 1976]
  A)
  Bacterial infected wound done clear
  B)
  Bacterial infected throat done clear
  C)
  Haemophilia done clear
  D)
  Bacterial infected gonorrhoea done clear
  View Solution play_arrow

• question_answer29)
  Haemophilia A is due to the absence of
  A)
  Antihaemophilic globulin done clear
  B)
  Calcium done clear
  C)
  Plasma thromboplastin done clear
  D)
  X chromosome done clear
  View Solution play_arrow

• question_answer30)
  If a boy's father has haemophilia and his mother has one gene for haemophilia; what is the chance that the boy will inherit the disease [CPMT 1980, 2000; DPMT 1992; AIIMS 1999; Pb. PMT 1999]
  A)
  25% done clear
  B)
  50% done clear
  C)
  75% done clear
  D)
  100% done clear
  View Solution play_arrow

• question_answer31)
  Carrier of genes of colour blindness are present in [CPMT 1989]
  A)
  Father done clear
  B)
  Mother done clear
  C)
  Father and mother done clear
  D)
  None done clear
  View Solution play_arrow

• question_answer32)
  Sickle cell anaemia is due to [CBSE PMT 1990]
  A)
  Hormones done clear
  B)
  Viruses done clear
  C)
  Genes done clear
  D)
  Bacteria done clear
  View Solution play_arrow

• question_answer33)
  Sex linked inheritance was discovered by [CPMT 1990]
  A)
  McClung done clear
  B)
  Mendel done clear
  C)
  Landsteiner done clear
  D)
  Morgan done clear
  View Solution play_arrow

• question_answer34)
  Colour blindness is caused by a single [CPMT 1990]
  A)
  Dominant gene in woman done clear
  B)
  Dominant gene in man done clear
  C)
  Recessive gene in man done clear
  D)
  Recessive gene in woman done clear
  View Solution play_arrow

• question_answer35)
  If a haemophilic man marries a woman carrier (heterozygous) for haemophilia, what would be the possibility that their daughter would be haemophilic [BHU 1990]
  A)
  100% done clear
  B)
  75% done clear
  C)
  50% done clear
  D)
  0% done clear
  View Solution play_arrow

• question_answer36)
  Female rarely experience the physiologic defect of haemophilia because they do so only when they are [MP PMT 1990]
  A)
  Heterozygous for the defect done clear
  B)
  Homozygous for the defect done clear
  C)
  Carrier for the defect done clear
  D)
  Wives of haemophilic husbands done clear
  View Solution play_arrow

• question_answer37)
  A colour blind son will born when [CPMT 1992, 93]
  A)
  Mother is normal and father normal done clear
  B)
  Mother is colour blind and father normal done clear
  C)
  Mother is normal and father is colour blind done clear
  D)
  All the cases are correct done clear
  View Solution play_arrow

• question_answer38)
  Haemophilia is [CPMT 1992, 93]
  A)
  Autosomal done clear
  B)
  Y-linked done clear
  C)
  Z-linked done clear
  D)
  X-linked done clear
  View Solution play_arrow

• question_answer39)
  A colourblind man has a colourblind sister but a normal brother than phenotype of its parents is [CPMT 1993]
  A)
  Father colourblind and mother normal done clear
  B)
  Father normal and mother colourblind done clear
  C)
  Father and mother both are colourblind done clear
  D)
  Father and mother both are normal done clear
  View Solution play_arrow

• question_answer40)
  The frequency of a character is found to be increasing when [CPMT 1993; MP PMT 2001]
  A)
  It is dominant done clear
  B)
  It is recessive done clear
  C)
  It is adaptable done clear
  D)
  It is inheritable done clear
  View Solution play_arrow

• question_answer41)
  The female children of a haemophilic man and a carrier woman are likely to be [MP PMT 1992]
  A)
  All haemophilic done clear
  B)
  Half haemophilic and half carriers done clear
  C)
  All carriers done clear
  D)
  Half normal and half carriers done clear
  View Solution play_arrow

• question_answer42)
  The daughter born to haemophilic father and normal mother could be [AIIMS 1992]
  A)
  Normal done clear
  B)
  Carrier done clear
  C)
  Haemophilic done clear
  D)
  None done clear
  View Solution play_arrow

• question_answer43)
  Haemophilia is caused due to lack of [AIIMS 1992]
  A)
  ADH done clear
  B)
  AHF done clear
  C)
  STH done clear
  D)
  ACTH done clear
  View Solution play_arrow

• question_answer44)
  One of the following is sex-influenced character
  A)
  Appearence of beard done clear
  B)
  Baldness in male done clear
  C)
  Docile behaviour of female done clear
  D)
  Low BMR in female done clear
  View Solution play_arrow

• question_answer45)
  Sex-linked genes of man are [Wardha 2005]
  A)
  Present on X-chromosome done clear
  B)
  Present on autosomes done clear
  C)
  Present on short arm (p) of Y-chromosome done clear
  D)
  Present on long arm (q) of Y-chromosome done clear
  View Solution play_arrow

• question_answer46)
  If a normal woman marries a colourblind man, their [KCET 1994; MP PMT 2002]
  A)
  All sons will be colourblind and daughters normal done clear
  B)
  All daughters will be colourblind and sons normal done clear
  C)
  All children will be normal done clear
  D)
  All children will be colourblind done clear
  View Solution play_arrow

• question_answer47)
  A girl of normal vision whose father was colourblind marries a man of normal vision whose father was also colourblind. Their sons would be (of total number of sons) [MP PMT 1995]
  A)
    All colourblind done clear
  B)
  50% colourblind done clear
  C)
  All normal done clear
  D)
  25% colourblind done clear
  View Solution play_arrow

• question_answer48)
  All the sons are haemophilic and daughter are normal of a haemophilic father and normal mother. This character is [CBSE PMT 1996]
  A)
  X-linked recessive done clear
  B)
  Y-linked recessive done clear
  C)
  X-linked dominant done clear
  D)
  Y-linked dominant done clear
  View Solution play_arrow

• question_answer49)
  In human the inheritance of sex linkage takes place through [MP PMT 2003]
  A)
  Autosome done clear
  B)
  Y - chromosome done clear
  C)
  X - chromosome done clear
  D)
  Both (b) and (c) done clear
  View Solution play_arrow

• question_answer50)
  Haemophilia is more commonly seen in human males than in human females because [CBSE PMT 2005]
  A)
  This disease is due to an X-linked dominant mutation done clear
  B)
  A grater proportion of girls die in infancy done clear
  C)
  This disease is due to an X-linked recessive mutation done clear
  D)
  This disease is due to a Y-linked recessive mutation done clear
  View Solution play_arrow

• question_answer51)
  A son of a colourblind father and normal homozygous mother marries to a daughter of normal father and heterozygous mother than their children will be
  A)
  All colourblind sons done clear
  B)
  All colourblind sons and daughters done clear
  C)
  Some colourblind and some normal daughters done clear
  D)
  Some normal and some colourblind sons done clear
  View Solution play_arrow

• question_answer52)
  Most studies on human genetics have been made through [MP PMT 1990]
  A)
  Genetic engineering done clear
  B)
  Eugenics done clear
  C)
  Microscopic study of chromosomes done clear
  D)
  Pedigree charts done clear
  View Solution play_arrow

• question_answer53)
  Given below is a pedigree chart of a family with five children. It shows the inheritance of attached earlobes as opposed to the free ones. The squares represent the male individuals and circles the female individuals [AIIMS 2004] Which one of the following conclusions drawn is correct
  A)
  The parents are homozygous recessive done clear
  B)
  The trait is Y-linked done clear
  C)
  The parents are homozygous dominant done clear
  D)
  The parents are heterozygous done clear
  View Solution play_arrow

• question_answer54)
  If a character is always transmitted directly from a father to all his sons and from their sons to all their sons, then which chromosome carries the gene for the character [MP PMT 1997, 2000]
  A)
  Autosomes done clear
  B)
  X chromosome done clear
  C)
  Y chromosome done clear
  D)
  None of the above done clear
  View Solution play_arrow

• question_answer55)
  A normal woman whose father was colourblind marries a normal man. What kinds of children would be expected and in what proportion [MP PMT 1997]
  A)
  Daughters normal, 50% of sons colourblind done clear
  B)
  Daughters normal, all sons colourblind done clear
  C)
  50% of daughters colourblind, all sons normal done clear
  D)
  All daughters colourblind, sons normal done clear
  View Solution play_arrow

• question_answer56)
  A colourblind daughter is born when [MP PMT 1998; CPMT 1991; Kerala CET 2002; Orissa JEE 2005]
  A)
  Father is colourblind, mother is normal done clear
  B)
  Mother is colourblind, father is normal done clear
  C)
  Mother is carrier, father is normal done clear
  D)
  Mother is carrier, father is colourblind done clear
  View Solution play_arrow

• question_answer57)
  What is the cause of haemophilia [MP PMT 1998]
  A)
  Chromosomal aberration done clear
  B)
  Somatic mutation done clear
  C)
  X-linked mutation done clear
  D)
  All the above done clear
  View Solution play_arrow

• question_answer58)
  Which disease is genetically linked [MP PMT 1996, 99]
  A)
  Haemophilia done clear
  B)
  Dysentery done clear
  C)
  Plague done clear
  D)
  Tuberculosis done clear
  View Solution play_arrow

• question_answer59)
  Haemophillic man marries a normal woman. Their offsprings will be [MP PMT 1993, 97; CBSE PMT 1999; CPMT 1999; Haryana PMT 2005]
  A)
  All girls done clear
  B)
  All normal done clear
  C)
  All haemophillic done clear
  D)
  All boys haemophilic done clear
  View Solution play_arrow

• question_answer60)
  When an allele fails to explain itself in presence of the other allele, the former is said to be [CBSE PMT1991]
  A)
  Recessive done clear
  B)
  Dominant done clear
  C)
  Codominant done clear
  D)
  Complementary done clear
  View Solution play_arrow

• question_answer61)
  A woman with two genes for haemophillia and one gene for colourblindness on one of the X chromosomes marries a normal man. How will the progeny be [CBSE PMT 1998]
  A)
  All sons and daughters haemophillic and colourblind done clear
  B)
  Haemophillic and colourblind daughters done clear
  C)
  50% haemophillic colourblind sons and 50% normal sons done clear
  D)
  50% haemophillic daughters and 50% colourblind daughters done clear
  View Solution play_arrow

• question_answer62)
  A fruit fly is heterozygous for sex-linked genes when meted with normal female fruit fly, the males specific chromosome will enter egg cell in the proportion [CBSE PMT 1997]
  A)
  1 : 1 done clear
  B)
  2 : 1 done clear
  C)
  3 : 1 done clear
  D)
  7 : 1 done clear
  View Solution play_arrow

• question_answer63)
  In which of the following colourblindness is inherited [MP PMT 2000]
  A)
  In males only done clear
  B)
  In females only done clear
  C)
  In both males and females done clear
  D)
  In none of the above done clear
  View Solution play_arrow

• question_answer64)
  Persons who are colour blind cannot distinguish [KCET 2000]
  A)
  Red and green done clear
  B)
  Black and yellow done clear
  C)
  Green and blue done clear
  D)
  Yellow and white done clear
  View Solution play_arrow

• question_answer65)
  Which of the following is a sex-linked character   [MH CET 2000]
  A)
  Baldness done clear
  B)
  Polio done clear
  C)
  Colourblindness done clear
  D)
    Heart disease done clear
  View Solution play_arrow

• question_answer66)
  Expected children of a blue-eyed (recessive) woman and brown-eyed (dominant) man who had a blue-eyed mother are likely to be [CBSE PMT 1991]
  A)
  All brown-eyed done clear
  B)
  One blue-eyed and one brown-eyed done clear
  C)
  All blue-eyed done clear
  D)
  Three blue-eyed and one brown-eyed done clear
  View Solution play_arrow

• question_answer67)
  Gene for colourblindness is located on  [CPMT 1984; MH CET 2002; MP PMT 2003]
  A)
  Homologous part of X-chromosome done clear
  B)
  Non-homologous part of X-chromosome done clear
  C)
  Homologous part of Y-chromosome done clear
  D)
  Non-homologous part of Y-chromosome done clear
  View Solution play_arrow

• question_answer68)
  A sex linked recessive gene C produces red green colour blindness in humans. A normal woman whose father was colourblind marries a colourblind man. Of all the girls born to these parents what percentage is expected to be colourblind [JIPMER 2002]
  A)
  25 percent done clear
  B)
  50 percent done clear
  C)
  75 percent done clear
  D)
  100 percent done clear
  View Solution play_arrow

• question_answer69)
  A diseased man marries a normal woman. They get three daughters and five sons. All the daughters were diseased and sons were normal. The gene of this disease is [CBSE PMT 2002; BVP 2002]
  A)
  Autosomal dominant done clear
  B)
  Sex linked recessive done clear
  C)
  Sex limited character done clear
  D)
  Sex linked dominant done clear
  View Solution play_arrow

• question_answer70)
  Pattern baldness, moustaches and beard in human males are examples of [CBSE PMT 2003]
  A)
  Sex-determining traits done clear
  B)
  Sex linked traits done clear
  C)
  Sex limited traits done clear
  D)
  Sex differentiating traits done clear
  View Solution play_arrow

• question_answer71)
  One of the genes present exclusively on the X-chromosome in humans is concerned with [AIIMS 2003]
  A)
  Baldness done clear
  B)
  Red-green colour blindness done clear
  C)
  Facial hair/moustaches in males done clear
  D)
  Night blindness done clear
  View Solution play_arrow

• question_answer72)
  One of the following is not true to haemophilia [Kerala CET  2003]
  A)
  Royal disease done clear
  B)
  Bleeder?s disease done clear
  C)
  X-linked disease done clear
  D)
  Y-linked disease done clear
  View Solution play_arrow

• question_answer73)
  What are all the chances of colour blind daughter and sons being born in a marriage of normal man marrying a normal woman, whose father was colour blind [Kerala CET  2003]
  A)
  All sons are normal and all daughters are colourblind done clear
  B)
  Both the sons and daughters are colourblind done clear
  C)
  All the sons are colourblind and all daughters are normal done clear
  D)
  50% sons are colourblind and all daughters are phenotypically normal done clear
  View Solution play_arrow

• question_answer74)
  A normal woman, whose father was colour-blind is married to a normal man. The sons would be [CBSE PMT 2004; MH CET 2004]
  A)
  All normal done clear
  B)
  All colour-blind done clear
  C)
  75% colour-blind done clear
  D)
  50% colour-blind done clear
  View Solution play_arrow

• question_answer75)
  If a normal women marries a colourblind man  [Kerala PMT 2004]
  A)
  All their children will be colourblind done clear
  B)
  All their sons will be colourblind but the daughters will be normal done clear
  C)
  All the children will be normal done clear
  D)
  all daughters will be colourblind and sons will be normal done clear
  E)
    All sons and 50% of daughters are normal but 50% daughters will be coloublind. done clear
  View Solution play_arrow

• question_answer76)
  Which one of the following is a genetically transmitted character    [Kerala PMT 2004]
  A)
  Colour blindness done clear
  B)
  Hydrocephalus done clear
  C)
  Hemophilia done clear
  D)
  Muscular dystrophy done clear
  E)
    All of these. done clear
  View Solution play_arrow

• question_answer77)
  The most common type of haemophilia results from the congenital absence of   [CPMT 2004]
  A)
  Factor II done clear
  B)
  Factor V done clear
  C)
  Factor VIII done clear
  D)
  Factor XI done clear
  View Solution play_arrow

• question_answer78)
  Haemophilia is a   [BHU 2004]
  A)
  Deficiency disorder done clear
  B)
  Y-linked disorder done clear
  C)
  X­-linked disorder done clear
  D)
  Autosomal sex disorder done clear
  View Solution play_arrow

• question_answer79)
  A marriage between normal visioned man and colourblind woman will produce which of the following types of offsprings    [BHU 2004]
  A)
  Normal sons and carrier daughters done clear
  B)
  Colourblind sons and carrier daughters done clear
  C)
  Colourblind sons and 50% carrier daughters done clear
  D)
  50% colourblind sons and 50% carrier daughters done clear
  View Solution play_arrow

• question_answer80)
  Sex influenced characters are due to   [MH CET 2004]
  A)
  Y-linked genes done clear
  B)
  X-linked genes done clear
  C)
  Autosomal genes done clear
  D)
  Y-linked gene modification done clear
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• question_answer81)
  Which of the following is not a hereditary disease [CBSE PMT 2005]
  A)
  Cretinism done clear
  B)
  Cystic fibrosis done clear
  C)
  Thalassaemia done clear
  D)
  Haemophilia done clear
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• question_answer82)
  A man and a woman, who do not show any apparent signs of a certain inherited disease, have seven children (2 daughters and 5 sons). Three of the sons suffer from the given disease but none of the daughters are affected which of the following mode of inheritance do you suggest for this disease [CBSE PMT 2005]
  A)
  Autosomal dominant done clear
  B)
  Sex-linked dominant done clear
  C)
  Sex-limited recessive done clear
  D)
  Sex-linked recessive done clear
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• question_answer83)
  A woman with normal vision, but whose father was colour blind, marries a colour blind man. Suppose that the fourth child of this couple was a boy. Thus boy  [CBSE PMT 2005]
  A)
  Will be partially colour blind since he is heterozygoustor for the colour blind mutant alble done clear
  B)
  Must have normal colour vision done clear
  C)
  Must be colour blind done clear
  D)
  May be colour blind or may be of normal vision, done clear
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• question_answer84)
  Sex linked disease is [CPMT 1978, 99, 2003; AFMC 2001;  Pb. PMT 2000; J&K CET 2002]
  A)
  Haemophilia done clear
  B)
  Colourblindness done clear
  C)
  Sickle-cell anaemia done clear
  D)
  Both (a) and (b) done clear
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• question_answer85)
  One way of detecting sex linked inheritance is [CPMT 1973]
  A)
  Son resembles mother and daughter resembles father done clear
  B)
  Son resembles father and daughter resembles mother done clear
  C)
  Both son and daughter resemble father done clear
  D)
  Both son and daughter resemble mother done clear
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• question_answer86)
  Given below is a pedigree chart showing the inheritance of a certain sex-linked trait in humans [AIIMS 2005] Key: The trait traced in the above pedigree chart is
  A)
  Dominant X-linked done clear
  B)
  Recessive X-linked done clear
  C)
  Dominant Y-linked done clear
  D)
  Recessive Y-linked done clear
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