The ratio of the number of chromosomes in a human zygote to a human sperm is:

1:4

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1:2

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2:1

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4:1

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Solution

The correct option is C 2:1
The nucleus of sperm consists of 22 + X or 22 + Y chromosomes. When it combines with the egg having 22 + X chromosomes, it restores the normal number, that is, 23 pairs or 46 chromosomes in the zygote.

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Similar questions

Number of chromosome in human sperm or ovum is 23.

(a) If a normal human cell has 46 chromosomes , how many chromosomes will be there in a human

(i) sperm cell,

(ii) zygote ?

(b) What sizes of plants are produced if both parents have genes Tt?

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