What is the means of segregation in Law of segregation? 

(1) Allelic separation

(2) Chromosomal separation

(3) Crossing over

(4) Linkage

Incomplete dominance is present in

(1) Snapdragon flower

(2) Dog flower

(3) Antirrhinum flower

(4) All of the above

A cross was performed between pea plants P1 (violet flower) and P2 (white flower). If obtained progeny showed ratio of 1 (violet) : 1 (white) , then determine the genotype of P1. 

(1) Homozygous recessive

(2) Heterozygous

(3) Homozygous dominant

(4) Can’t be determined

ABO blood groups are controlled by which gene

(1) a

(2) I

(3) b

(4) All of the above

What does Blending inheritance refers to? 

(1) Mixed characters in an offspring

(2) Dominant character

(3) Recessive character

(4) Dominant & recessive character

Our ancestors knew about the inheritance of characters and variations because-

(1) They selectively breed plants and animals and selected for organisms that possessed desirable characters.

(2) They introduced mutations

(3) They performed natural hybridisation

(4) All of the above

Monohybrid cross can be defined as

(1) Cross between plants differing in one chromosome

(2) Cross between plants differing in one character only

(3) Cross between plants differing in two traits

(4) All of the above

Types of gametes produced by a homozygous parent

(1) many

(2) single type

(3) depends upon number of genes

(4) depends upon number of chromosomes

If a man consists of an extra copy of chromosome number 18, then the condition is known as

1. Monosomy

2. Trisomy

3. Nullisomy

4. Polyploidy

Down’s syndrome was first described in the year

(1) 1962

(2) 1866

(3) 1856

(4) 1863