Chapter 4: Principles of Inheritance and Variation MCQs | biology Class 12 CBSE

ByteNotes

Chapter 4: Principles of Inheritance and Variation MCQs | biology Class 12 CBSE | ByteNotes.in

MCQ

Easy difficulty • Choose the correct option

Easy

Question 1

Objective

How many contrasting traits (pairs of characters) did Mendel select for his experiments on garden pea?

Choices

ByteNotes

MCQ

Easy difficulty • Choose the correct option

Easy

Question 2

Objective

In Mendel's monohybrid cross between tall (TT) and dwarf (tt) pea plants, what was the phenotypic ratio in the F2 generation?

Choices

ByteNotes

MCQ

Easy difficulty • Choose the correct option

Easy

Question 3

Objective

A cross between an organism showing a dominant phenotype (of unknown genotype) and a homozygous recessive individual is called a:

Choices

ByteNotes

MCQ

Easy difficulty • Choose the correct option

Easy

Question 4

Objective

The Law of Dominance states that in a pair of dissimilar alleles:

Choices

ByteNotes

MCQ

Easy difficulty • Choose the correct option

Easy

Question 5

Objective

The Punnett Square is a graphical method used to:

Choices

ByteNotes

MCQ

Easy difficulty • Choose the correct option

Easy

Question 6

Objective

In a cross between true-breeding red (RR) and white (rr) flowered Antirrhinum plants, the F1 plants are pink (Rr). This is an example of:

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 7

Objective

The ABO blood group system in humans is controlled by gene I with three alleles (IA, IB, i). How many different genotypes are possible in the human population for ABO blood groups?

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 8

Objective

Which of the following correctly describes co-dominance?

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 9

Objective

The Law of Independent Assortment applies to genes that are located on:

Choices

ByteNotes

MCQ

Easy difficulty • Choose the correct option

Easy

Question 10

Objective

Morgan's experimental organism, Drosophila melanogaster, was preferred for genetic studies mainly because:

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 11

Objective

The term 'linkage' as coined by Morgan refers to:

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 12

Objective

Alfred Sturtevant used recombination frequency between gene pairs to:

Choices

ByteNotes

MCQ

Easy difficulty • Choose the correct option

Easy

Question 13

Objective

In humans, sex is determined by which parent?

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 14

Objective

In birds, which sex is heterogametic?

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 15

Objective

In honey bees, males (drones) are produced by:

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 16

Objective

A point mutation in the beta globin gene converts codon GAG to GUG at position 6. This substitutes which amino acid for which?

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 17

Objective

Colour blindness is more common in males than in females because:

Choices

ByteNotes

MCQ

Easy difficulty • Choose the correct option

Easy

Question 18

Objective

Down's syndrome is caused by trisomy of which chromosome?

Choices

ByteNotes

MCQ

Easy difficulty • Choose the correct option

Easy

Question 19

Objective

Klinefelter's syndrome is associated with which karyotype?

Choices

ByteNotes

MCQ

Medium difficulty • Choose the correct option

Medium

Question 20

Objective

Turner's syndrome is characterised by:

Choices

ByteNotes

Premium Access

Unlock all MCQs

You are viewing 20 free MCQs from this chapter. Upgrade to Premium to unlock the remaining 20 questions.

Upgrade to Premium20 questions locked

Chapter sections

Chapter 4: Principles of Inheritance and Variation | MCQs

How many contrasting traits (pairs of characters) did Mendel select for his experiments on garden pea?

In Mendel's monohybrid cross between tall (TT) and dwarf (tt) pea plants, what was the phenotypic ratio in the F2 generation?

A cross between an organism showing a dominant phenotype (of unknown genotype) and a homozygous recessive individual is called a:

The Law of Dominance states that in a pair of dissimilar alleles:

The Punnett Square is a graphical method used to:

In a cross between true-breeding red (RR) and white (rr) flowered Antirrhinum plants, the F1 plants are pink (Rr). This is an example of:

The ABO blood group system in humans is controlled by gene I with three alleles (IA, IB, i). How many different genotypes are possible in the human population for ABO blood groups?

Which of the following correctly describes co-dominance?

The Law of Independent Assortment applies to genes that are located on:

Morgan's experimental organism, Drosophila melanogaster, was preferred for genetic studies mainly because:

The term 'linkage' as coined by Morgan refers to:

Alfred Sturtevant used recombination frequency between gene pairs to:

In humans, sex is determined by which parent?

In birds, which sex is heterogametic?

In honey bees, males (drones) are produced by:

A point mutation in the beta globin gene converts codon GAG to GUG at position 6. This substitutes which amino acid for which?

Colour blindness is more common in males than in females because:

Down's syndrome is caused by trisomy of which chromosome?

Klinefelter's syndrome is associated with which karyotype?

Turner's syndrome is characterised by:

Unlock all MCQs

Practice in Quiz Mode