Which of the following most appropriately describes haemophilia?
1. X-linked recessive gene disorder
2. Chromosomal disorder
3. Dominant gene disorder
4. Recessive gene disorder

The term "linkage" was coined by?

1. T.H. Morgan

2. T.Boveri

3. G.Mendel

4. W.Sutton

In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree: 

1. Autosomal dominant

2. X-linked recessive

3. Autosomal recessive

4. X-linked dominant

In his classic experiments on pea plants Mendel did not use?

1. Seed color

2. Pod length

3. Seed shape

4. Flower position

A pleiotropic gene:

How many pairs of contrasting characters in pea plants were studied by Mendel in his experiments?

Alleles are:
1. different phenotype
2. true breeding homozygotes
3. different molecular forms of a gene
4. heterozygotes

A man with blood group 'A' marries a woman with blood group 'B'. What are all the possible blood groups of their offspring?