What is the cause of variation? 

(1) Asexual reproduction

(2) Amitosis

(3) Mitosis

(4) Meiosis

How many laws of Mendel are based on monohybrid cross?

(1) 1

(2) 2

(3) 3

(4) 4

Which of the following statements are correct with respect to Law of dominance : 

i. Tall and dwarf traits were identical to their parental type and didn’t show any blending

ii. Only one of the parental traits was expressed in F1 generation.

iii. Both traits were expressed in the F2 generation.

iv. The contrasting trait showed blending at F2 generation.

(1) ii, iii and iv

(2) i, ii and iii

(3) ii and iii

(4) i, ii, iii and iv

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

Which of the following genotype express gametes? 

(1) TtRrAa

(2) TtRA

(3) ATRr

(4) NMLr

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

A cross between tall pea plant and its recessive parent is known as 

(1) Back cross

(2) Test cross

(3) Recessive cross

(4) Dominant cross

What will be the genotype of parental plants if they produced 25 AA : 48 Aa : 26 aa 

(1) AA and AA

(2) AA and aa

(3) Aa and Aa

(4) aa and aa

Which of the following was not explainedby the Mendel’s law of dominance? 

(1) Characters are controlled by discrete units called factors.

(2) Factors occur in pairs.

(3) Every factor has alternate forms known as alleles

(4) In a dissimilar pair of factors one member of the pair dominatesthe other.