Genetics and Evolution (NEET Biology): Questions 71 - 76 of 154

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Question number: 71

» Genetics and Evolution » Heredity and Variation » Down's Syndrome, Turner's and Klinefelter's Syndromes

MCQ▾

Question

Genotype of a Down’s syndrome is

Choices

Choice (4) Response

a.

44 + XY

b.

44 + XXY

c.

45 + XX

d.

22 + XY

Question number: 72

» Genetics and Evolution » Heredity and Variation » Mendelian Disorders in Humans-Thalassemia

MCQ▾

Question

If in albino man marries with a normal woman and 50 offsprings are albino and 50 are normal, the woman is

Choices

Choice (4) Response

a.

Heterozygous normal

b.

Homozygous normal

c.

Heterozygous carrier

d.

All of the above

Question number: 73

» Genetics and Evolution » Heredity and Variation » Sex Linked Inheritance-Hemophilia, Color Blindness

MCQ▾

Question

A man known to be victim of haemophilia marries a normal woman whose father was known to be a bleeder. Then it is expected that

Choices

Choice (4) Response

a.

Half of their children will be bleeders.

b.

One fourth of their children will be bleeders.

c.

None of their children will be bleeders.

d.

All their children will be bleeders.

Question number: 74

» Genetics and Evolution » Heredity and Variation » Mendelian Inheritance

MCQ▾

Question

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

Choices

Choice (4) Response

a.

None

b.

Less than 5 per cent

c.

Half

d.

One third

Question number: 75

» Genetics and Evolution » Heredity and Variation » Incomplete Dominance

MCQ▾

Question

What will be the ratio in F2 generation if red flowered variety of Mirabilis jalapa is crossed with white flowered variety?

Choices

Choice (4) Response

a.

2: 1

b.

3: 1

c.

1: 1: 1: 1

d.

1: 2: 1

Question number: 76

» Genetics and Evolution » Heredity and Variation » Mendelian Inheritance

MCQ▾

Question

A man homozygous for brown colour marries a lady heterozygous for brown colour is (dominant). What will be the fate of their children?

Choices

Choice (4) Response

a.

Three brown

b.

All brown

c.

Two brown

d.

None of the above

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