A human sperm may contain

Question

Question

This question was previously asked in

RRB Pharmacist Previous Year Paper 2015

Answer 1

Correct Answer: 1 and 2

Rationale:

A human sperm may contain either an X-chromosome or a Y-chromosome. This is because during spermatogenesis, the process of sperm cell development, the sex chromosomes segregate, resulting in sperm cells that carry either one of the two sex chromosomes.
The presence of an X-chromosome in a sperm cell will result in female offspring (XX) when it fertilizes an egg, while the presence of a Y-chromosome will result in male offspring (XY).

Explanation of Other Options:

X-chromosome

Rationale: While it's true that a sperm cell can contain an X chromosome, this option alone does not fully answer the question as it does not account for the possibility of a Y-chromosome.

Y-chromosome

Rationale: Similarly, a sperm cell can contain a Y-chromosome, but this option alone is incomplete as it does not consider the X-chromosome possibility.

XY-chromosome

Rationale: This option is incorrect because a single sperm cell cannot contain both X and Y chromosomes. Each sperm cell carries only one sex chromosome, either X or Y, but not both.

Conclusion:

Among the given options, "1 and 2" is the correct answer because a human sperm may contain either an X-chromosome or a Y-chromosome, but not both simultaneously.

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