A pea plant parent having violet-coloured flowers with unknown genotype was crossed with a plant having white-coloured flowers. In the progeny, 50% were white. The genotypic constitution of the parent having violet-coloured flowers was

1. homozygous

2. merozygous

3. heterozygous

4. hemizygous

In two pea plants having red (dominant) coloured flowers with unknown genotypes are crossed, 75% of the flowers are red and 25% are white. The genotypic constitution of the parents having red coloured flowers will be 

(1) both homozygous

(2) one homozygous and other heterozygous

(3) both heterozygous

(4) both hemizygous

How many pairs of contrasting traits studied by Mendel were related to pod?

(1) 1

(2) 2

(3) 3

(4) 4

Among the given pea plant traits identify the odd one

(1) Violet flower

(2) Yellow seed

(3) Yellow pod

(4) Axial flower position

Which of the following does not contribute to Mendel’s success?

(1) Large sampling size

(2) Statistical analysis

(3) Performed experiments on single variety of pea

(4) Performed experiments on successive generations

“Filial 1 progeny” refers to

(1) First pure breed

(2) First offspring

(3) First hybrid generation

(4) Second hybrid generation

How many laws of Mendel are based on monohybrid cross?

(1) 1

(2) 2

(3) 3

(4) 4

Mendel was born in 

(1) 19^th century.

(2) 18^th century.

(3) 17^th century.

(4) 20^th century.

Gregor Mendel is known for 

(1) Species concept

(2) Hybridisation experiments

(3) Discovery of chromosomes

(4) Experiments on maize plant

A cross between tall and dwarf plant was performed and 120 offspring were produced in which 90 plants were tall and 30 were dwarf. Find out the genotype of their parents. 

(1) Tt and TT

(2) Tt and Tt

(3) TT and tt

(4) tt and tt