Genetics and Evolution (NEET Biology): Questions 65 - 70 of 154

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Question number: 65

» Genetics and Evolution » Heredity and Variation » Mendelian Inheritance

MCQ▾

Question

When heterozygous tall plants are self-pollinated than tall and dwarf plants are obtained, this is an explanation to

Choices

Choice (4) Response

a.

Segregation of law.

b.

Law of purity of gamete.

c.

Division in scores.

d.

Independent assortment.

Question number: 66

» Genetics and Evolution » Evolution » Natural Selection

MCQ▾

Question

Albinism is known to be due to an autosomal recessive mutation. The first child of a couple with normal skin pigmentation was an albino. What is the probability that their second child will also be an albino?

Choices

Choice (4) Response

a.

50%

b.

75%

c.

25%

d.

100%

Question number: 67

» Genetics and Evolution » Evolution » Natural Selection

MCQ▾

Question

A mutation is most likely to have a selective advantage in evolution if

Choices

Choice (4) Response

a.

It affects dominant genes.

b.

If affects whole chromosomes.

c.

It affects recessive genes.

d.

The environment remains stable.

Question number: 68

» Genetics and Evolution » Molecular Basis of Inheritance » Translation

MCQ▾

Question

After a mutation at a genetic locus the character of an organism changes due to the change in

Choices

Choice (4) Response

a.

DNA replication.

b.

RNA transcription pattern

c.

Protein synthesis pattern.

d.

Protein structure

Question number: 69

» Genetics and Evolution » Molecular Basis of Inheritance » DNA Replication

MCQ▾

Question

Restriction endonucleases are

Choices

Choice (4) Response

a.

Synthesized by bacteria

b.

Present in mammalian cells for degradation of DNA.

c.

Used for in vitro DNA synthesis.

d.

Used in genetic engineering

Question number: 70

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

MCQ▾

Question

Why some mutations which are harmful do not get eliminated from the gene pool?

Choices

Choice (4) Response

a.

Genetic drift occurs because of a small population area.

b.

They are dominant and show up more frequently.

c.

They are recessive and carried by heterozygous individuals.

d.

They have future survival value.

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