Which of the following traits shows expression in only homozygous condition?

1.  Yellow seed

2.  Inflated pod

3.  Axial flower

4.  Wrinkled seed

In the given below figure what does (a) and (b) represent

1.  GAG, Glumatic acid

2.  GUG, Valine

3.  GAG, Valine

4.  GUG, Glumatic acid 

Choose odd one out with respect to chromosomal disorder

1.  Down's syndrome

2.  Klinefelter's syndrome

3.  Turner's syndrome

4.  Thalassemia 

Morgan worked with the tiny fruit flies - Drosophila melanogaster, which were suitable for genetical studies, as

a.  They could be grown on simple medium

b.  They complete their life cycle in about two weeks

c.  Single mating could produce a large number of progeny flies

d.  No clear cut sexual dimorphism is found 

1.  Only d is incorrect

2.  Both a and d are incorrect

3.  Only b is correct

4.  Both c and d are incorrect 

Match the following

1.  a(ii), b(iv), c(i), d(iii)
2.  a(ii), b(iv), c(iii), d(i)
3.  a(iv), b(ii), c(i), d(iii)
4.  a(iv), b(i), c(ii), d(iii) 

Who noticed that the behaviour of chromosomes is parallel to the behaviour of genes?

1.  Temin and Baltimore

2.  Correns and Tschermak

3.  Beadle and Tatum

4.  Sutton and Boveri 

Experiment verification of the chromosomal theory of inheritance was given by

1.  Sutton and Boveri 

2.  Thomas Hunt Morgan

3.  de Vries

4.  Mendal 

In human ABO group system ________ different alleles allow the possibility of _______ different types of genotypes in population.

1.  3, 4

2.  2, 4

3.  3, 6

4.  6, 3 

The phenotype of an individual may be affected if the modified allele produces

A.  The normal/less efficient enzyme

B.  No enzyme at all

C.  A non-functional enzyme

1.  Only A is correct 

2.  Only C & A are correct

3.  Only B is correct

4.  B & C are correct 

Ability of a gene to have multiple phenotypic effects is known as

1.  Co-dominance 

2.  Pleiotropy

3.  Multiple allelism

4.  Incomplete dominance