Human Genetics Test Online MCQs

1. Given below is a high simplified representation of the human sex chromosomes from a karyotype.

The genes a and b could be of

2. The “Cri-du-Chat” syndrome is caused by change in chromosome structure involving

3. A normal woman whose father was colour blind, is married to a normal man. The sons would be

4. XO-chromosomal abnormality in human beings causes

5. Which disease has XXY chromosome constitution?

6. The formation of multivalent at meiosis in diploid organism is due to

7. Mother and father both have blood group ‘A’. They have two children one with blood group ‘O’ and second one with blood group ‘A’. They have

Mother has homozygotic gene father has heterozygote I’^A I^A.

Mboth are homozygotic (I^AI^A).

Mother is heterozygotic (I^Ai) and father is homozygotic (I^AI^A).

Both are heterozygotic (I^Ai).

8. Barr-body in mammals represents