Genes which code for a pair of contrasting traits are known as

(1) Factors

(2) Alleles

(3) Linked genes

(4) Lethal genes

Subtopic:  Monohybrid Cross: 1 |
 84%
From NCERT
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ABO blood groups are controlled by which gene

(1) a

(2) I

(3) b

(4) All of the above

Subtopic:  Dominance Deviation from Mendel: 2 |
 65%
From NCERT
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Co-dominance refers to the condition where F1

(1) resembles the dominant parent

(2) is in-between the parents

(3) resembled the recessive parents

(4) resembles both the parents

Subtopic:  Dominance Deviation from Mendel: 2 |
 85%
From NCERT
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What does Blending inheritance refers to? 

(1) Mixed characters in an offspring

(2) Dominant character

(3) Recessive character

(4) Dominant & recessive character

Subtopic:  Dominance Deviation from Mendel: 1 |
 85%
From NCERT
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In human ABO blood grouping possible number of genotypes is

(1) 3

(2) 4

(3) 6

(4) 9

Subtopic:  Dominance Deviation from Mendel: 2 |
 80%
From NCERT
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Recessive character is expressed in

(1) F0

(2) F1

(3) F2

(4) Never expressed.

Subtopic:  Monohybrid Cross: 1 |
 88%
From NCERT
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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

Subtopic:  Introduction to Genetics: 1 |
 50%
From NCERT
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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

Subtopic:  Monohybrid Cross: 1 |
 60%
From NCERT
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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

Subtopic:  Monohybrid Cross: 1 |
 85%
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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

Subtopic:  Non - Disjunction & Aneuploidy |
 81%
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