A gene showing co-dominance has?

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

A colour-blind man marries a woman with normal sight who has no history of colour blindness in her family. What is the probability of their grandson being colour blind? (consider the grandsons only through son)

1. 0.5

2. 1

3. Nil

4. 0.25

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?

The movement of a gene from one linkage group to another is called:

Multiple alleles are present:

1. on different chromosomes
2. at different loci on the same chromosome
3. at the same locus of the chromosome
4. on non-sister chromatids

An abnormal human baby with 'XXX' sex chromosomes was born due to:
1. formation of abnormal ova in the mother
2. fusion of two ova and one sperm
3. fusion of two sperms and one ovum
4. formation of abnormal sperms in the father