Home
Class 12
BIOLOGY
Down's syndrome in humans is due to...

Down's syndrome in humans is due to

A

Extra sex cromosome

B

Extra 21st chromosome

C

Extra Y-chromosome

D

Deficient sex chromosome

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

Pick out the correct statement (I) Haemophilia is a sex-linked recessive disease (II) Down's syndrome is due to aneuploidy (III) Phenylketonuria is an autosomal recessive gene disorder (IV) Sickle-cell anaemia is an X-linked recessive gene disorder

Turner's syndrome is

Down's syndrome is a typical case of

Down's syndrome is an example of

Down's syndrome is caused by the presence of extra chromosome number

What is Down's syndrome? Give its symotoms and cause. Why is it that the chances of having a child with Down's syndrome incrreases if the age of the mother exceeds forth years ?

Down's syndrome or Mongoloid idiocy (Mongolism) is due to

A human being suffering from Down's Syndrome shows trisomy of 21^(st) chromosome. Mention the cause of this chromosomal abnormality.

In Down's syndrome the chromosome number in each cell of body is

Write three symptoms of Down's Syndrome. What is chromosome mapping?