Human Genetics Test Online MCQs

1. XO-chromosomal abnormality in human beings causes

2. Barr-body in mammals represents

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

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

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

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

The genes a and b could be of

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. Which disease has XXY chromosome constitution?