Genetics and Evolution (AIIMS Biology): Questions 30 - 34 of 40

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Question number: 30

» Genetics and Evolution » Heredity and Variation » Elementary Idea of Polygenic Inheritance

Appeared in Year: 2005

MCQ▾

Question

Grain colour in wheat is determined by three pairs of polygenes. Following cross AABBCC (dark colour) x aabbcc (light colour), in F2 generation what proportion of the progeny is likely to resemble either parent?

Choices

Choice (4) Response

a.

Half

b.

Less than 5 percent

c.

One third

d.

Question does not provide sufficient data or is vague

Question number: 31

» Genetics and Evolution » Heredity and Variation » Chromosomes and Genes

Appeared in Year: 2005

MCQ▾

Question

The “cri-du-chat” syndrome in caused by change in chromosome structure involving

Choices

Choice (4) Response

a.

Translocation

b.

Deletion

c.

Inversion

d.

Duplication

Question number: 32

» Genetics and Evolution » Heredity and Variation » Chromosomes and Genes

Appeared in Year: 2005

Assertion-Reason▾

Assertion (Ꭺ)

Senescence is the time when age associated defects are manifested.

Reason (Ꭱ)

Certain genes may be undergoing sequential switching on and off during one’s life.

Choices

Choice (4) Response

a.

Ꭺ is true but Ꭱ is false

b.

Both Ꭺ and Ꭱ are false

c.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

d.

Ꭺ is false but Ꭱ is true

Question number: 33

» Genetics and Evolution » Evolution » Origin of Life

MCQ▾

Question

Abiogenesis means

Choices

Choice (4) Response

a.

Origin of life from living organisms.

b.

Origin of viruses and microbes.

c.

Origin of life from non-living organisms.

d.

All of the above

Question number: 34

» Genetics and Evolution » Molecular Basis of Inheritance

MCQ▾

Question

Which of the following is false?

Choices

Choice (4) Response

a.

Most plant viruses are RNA viruses.

b.

Most animal viruses are DNA viruses.

c.

T4 bacteriophage has double stranded DNA molecule.

d.

TMV has double stranded RNA molecule.

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