In Mendel's experiments with garden peas, round seed shape (RR) was dominant over wrinkled seeds (rr), and yellow cotyledon (YY) was dominant over green cotyledon (yy). What are the expected phenotypes in the F₂ generation of the cross RRYY x rryy?

1.	Only round seeds with green cotyledons
2.	Only wrinkled seeds with yellow cotyledons
3.	Only wrinkled seeds with green cotyledons
4.	Round seeds with yellow cotyledons and wrinkled seeds with yellow cotyledons

Test cross involves:

If a colourblind woman marries a normal-visioned man, their sons will be:

1. all normal visioned

2. one-half colourblind and one-half normal

3. three-fourths colourblind and one-fourth normal

4. all colourblind

Cri-du-chat syndrome in humans is caused by the:

Sickle cell anaemia has not been eliminated from the African population because:

1. It is controlled by recessive genes

2. It is not a fatal disease

3. It provides immunity against malaria

4. It is controlled by dominant genes

Both sickle cell anaemia and Huntington’s chorea are:

1. bacteria-related diseases.

2. congenital disorders

3. pollutant-induced disorders

4. virus-related diseases

Which one of the following is an example of polygenic inheritance?

1. Flower colour in Mirabilis jalapa

2. Production of male honey bee

3. Pod shape in garden pea

4. Skin colour in humans

How many different kinds of gametes will be produced by a plant having the genotype AABbCC?

1. Three

2. Four

3. Nine

4. Two

In which mode of inheritance do you expect more maternal influence among the offspring?

1. Autosomal

2. Cytoplasmic

3. Y-linked 

4. X-linked

Phenotype of an organism is the result of:

1. mutations and linkages

2. cytoplasmic effects and nutrition

3. environmental changes and sexual dimorpgism

4. genotype and environment interactions