A) Down syndrome
B) triploidy
C) Turner syndrome
D) super femaleness
Correct Answer: A
Solution :
Downs syndrome is due to an extra chromosome, which combines to the chromosome pair 21. Down syndrome is caused due ro trisomy, in which the fusion of a normal n gamete (haploid) takes place with an n + 1 gamete (diploid). J. Langdon Down first described the developmental defect produced by trisomy in 1866. For this reason it is called Downs syndrome. Persons having Downs syndrome generally have a short, stocky build, short hands, flattened facial features and poor muscle tone. In addition they are mentally retarded.
You need to login to perform this action.
You will be redirected in
3 sec
