What is the number of linkage groups in humans?

1. 22
2. 23
3. 24
4. 46

Assuming complete dominance
recessiveness and independent assortment,
the ratio of progeny with the genotypes AaBb,
AABb, Aabb and aaBb from a cross AaBb X
AABb would respectively be:
1. 4:4:2:0
2. 4:2:4:2
3. 4:4:2:2
4. 4:4:2:1

An abnormal human of the karyotype 49, XXXYY will form how many Barr bodies?

1. 1
2. 2
3. 3
4. 4

Eye color in a fly is inherited via a single gene with seven different alleles. How many different types of gametes would be possible in this system in an individual fly?
1. 2
2. 7
3. 28
4. 56

Identify the condition where the following karyotype is expected:

1. Klinefelter’s syndrome
2. Cri du chat syndrome
3. Turner’s syndrome
4. Down’s syndrome

Which of the following experiments can show a gene to be located on the X-chromosome?
I. set up reciprocal crosses
II. set up two point test cross
1. Only I
2. Only II
3. Neither I nor II
4. Both I & II

A man and woman who both have normal pigmentation but both having an albino parent have two children both with normal pigmentation. What is the probability that their child might be an albino?
1. 0
2. ¼
2. ½
3. ¾

Sons inherit the following exclusively from their mothers:
I. SR Y gene
II. X chromosome
III. Mitochnodrial DNA
1. Only II
2. Only I and III
3. Only II and III
4. Only III

Identify the chromosomal aberration:

1. Inversion
2. Translocation
3. Deletion
4. Duplication

Two genes are linked. The frequency of recombinants formed between the two loci will be:
1. different between males and females.
2. determined by their relative dominance.
3. the same as if they were not linked.
4. proportional to the distance between them.