In human ABO blood grouping possible number of genotypes is

(1) 3

(2) 4

(3) 6

(4) 9

To view Explanation, Please buy any of the course from below.
High Yielding Test Series + Question Bank - NEET 2020

Difficulty Level:


What is the phenotypic and genotypic ratio of F2 generation in incomplete dominance? 

(1) 3:1 and 1:2:1

(2) 1:2:1 and 3:1

(3) 1:2:1

(4) 1:1:1

Please attempt this question first.

Difficulty Level:


Recessive character is expressed in

(1) F0

(2) F1

(3) F2

(4) Never expressed.

Please attempt this question first.

Difficulty Level:


Type of pollination in Pisumsativum is

(1) Cross pollination

(2) Self-pollination

(3) Bud pollination

(4) Both 2 and 3

Please attempt this question first.

Difficulty Level:


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

Please attempt this question first.

Difficulty Level:


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

Please attempt this question first.

Difficulty Level:


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

Please attempt this question first.

Difficulty Level:


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

Please attempt this question first.

Difficulty Level:


Disorder caused by the trisomy of chromosome number 21

(1) Klinefelter’s syndrome

(2) Turner’s syndrome

(3) Down’s syndrome

(4) Phenylketonuria

Please attempt this question first.

Difficulty Level:


Down’s syndrome was first described in the year

(1) 1962

(2) 1866

(3) 1856

(4) 1863

Please attempt this question first.

Difficulty Level: