A test cross is done to find out:

(1) Fitness of an organism

(2) Genotype of a plant expressing dominant phenotype

(3) The suitable parents for a Mendelian Cross

(4) The hidden genotypic ratio of F2 phenotypes

What is the ratio of a typical monohybrid test cross?

The law of Segregation is based on the fact that

1. The alleles do not show any blending

2. There is random fertilization

3. Gametes are pure for the trait

4. The zygotes are diploid

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

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: