The inheritance of flower colour in dog flower and 4’O clock plant exhibits:

1. Complete dominance

2. Incomplete dominance

3. Co-dominance

4. Lethality

In complete dominance, the recessive allele with respect to the dominant allele:

The number of alleles, the genotypic combinations and phenotypes in ABO system is respectively:

Suppose a gene has seven alleles. What would be the number of alleles in an individual at any instant?

(1) 1

(2) 7

(3) 2

(4) 3

In case of starch synthesis in pea seeds [controlled by B gene], BB homozygotes produce large and round starch grains; bb homozygotes produce smaller and wrinkled starch grains and Heterozygotes produce round seeds of intermediate size. What can be inferred from this observation?

(1) The gene B mutates at a faster rate.

(2) The gene B is easily influenced by the environment

(3) Dominance is not an autonomous feature of a gene or the product that it has information for

(4) Some genes do not follow the law of segregation

When Mendel self hybridized F1 progeny of a dihybrid cross between pure Yellow Round seeded plants and Green Wrinkled plants, he observed that yellow and green colour segregated in a ratio of:

In 1900 Mendel’s work was rediscovered by:

Genes tightly linked on the same chromosome show:

In humans, the mechanism of sex determination is:

A couple has a daughter. What is the probability that their next child will be a daughter?

(1) 0 %

(2) 25 %

(3) 50 %

(4) 100 %