NEET Biology Genetics Question Bank

done Twins and I Q Eugenics Euthenics and Euphenics

• question_answer1) Fraternal twins are produced when [NCERT 1976; CPMT 1990]

  A) A fertilized egg divided into two

  B) An egg is fertilized by two sperms

  C) A divided egg has two set of chromosomes

  D) Two eggs are fertilized simultaneously

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• question_answer2) Identical twins are [AFMC 1986]

  A) Heterozygous

  B) Homozygous

  C) Monozygotic

  D) Dizygotic

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• question_answer3) An organism which receives identical alleles of a particular gene from both parents is [CBSE PMT 1993]

  A) Heterozygote

  B) Holometabolous

  C) Homosapiens

  D) Homozygote

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• question_answer4) Differences in twins suggest [NCERT 1983]

  A) Incomplete dominance

  B) That phenotype is influenced by many genes

  C) That single gene may produce multiple effects

  D) That they develop from two different eggs

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• question_answer5) If in a child of 10 years ages of the intelligence is of 14 years child, the I.Q. of this child would be [CPMT 1986]

  A) 140

  B) 100

  C) 160

  D) 110

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• question_answer6) The I.Q. of a genius ranges from [CPMT 1980]

  A) 70-89

  B) 90-109

  C) 110-139

  D) 140-more

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• question_answer7) I.Q. is the ratio of mental age to [CPMT 1983]

  A) Chronological age multiplied by ten

  B) Chronological age plus ten

  C) Chronological age plus 100

  D) Chronological age multiplied by 100

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• question_answer8) Sometimes the separation of twins is incomplete and these are borne attached are remain so even after. Such twins are known as [MH CET 2002]

  A) Fraternal

  B) Dizygotic

  C) Identical

  D) Siamese

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• question_answer9) Genetically identical progeny is produced when an individual [AFMC 1994]

  A) Practices self-fertilization

  B) Produces identical gametes

  C) Practices reproduction

  D) Practices in breeding without meiosis

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• question_answer10) Twin is [Haryana PMT 2005]

  A) Developed from same zygote

  B) Developed from different zygote

  C) Two different sperm

  D) Two different ovum

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• question_answer11) Two offspring developed in the same uterus but from fertilization of two different ova are [AFMC 2002]

  A) Dizygotic twins

  B) Monozygotic twin

  C) Fraternal twins

  D) Both (a) and (c)

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• question_answer12) Euphenics is [DPMT 1992]

  A) Improvement of human race by better environment

  B) Improvement of human race by genetic engineering

  C) Treatment of communicable diseases

  D) Treatment of inheritable diseases

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• question_answer13) The best method to improve the genetic quality of mankind is [CPMT 1974; AFMC 1976]

  A) Marriage restrictions

  B) Sterilizations

  C) Control of immigrations

  D) Sexual separation of defectives

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• question_answer14) Curing of genetic diseases is studied under

  A) Genetics

  B) Eugenics

  C) Euphenics

  D) Dysgenics

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• question_answer15) 'Eugenics' pertains to [CPMT 1984, 86; CBSE PMT 1990]

  A) Improvement of mankind by improving his heredity

  B) Preservating human sperms for artificial insemination

  C) Study of human genetics

  D) Controlling size of a human family

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• question_answer16) Study of improvement of human race by providing ideal nature is [CBSE PMT 1990; CPMT 1991]

  A) Eugenics

  B) Euphenics

  C) Euthenics

  D) None of these

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• question_answer17) Improvement of genetic characters and present day generation on the basis of best nutrition and training is called [MP PMT 1995]

  A) Eugenics

  B) Euphanics

  C) Euthenics

  D) Gerontology

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• question_answer18) Improvement of human race by improving the environment is called [MP PMT 1998]

  A) Euphenics

  B) Eugenics

  C) Euthenics

  D) None of them

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• question_answer19) Study of human race is called [AFMC 1997; Haryana PMT 2005; MP PMT 2005]

  A) Eugenics

  B) Entomology

  C) Ecology

  D) Pathology

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• question_answer20) The grafting between two identical twins is known as

  A) Allograft

  B) Autograft

  C) Isograft

  D) Xenograft

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