If a sperm carrying an X chromosome fuses with the egg, what will be the sex of the child?
Answer and explanation
Correct answer: Female child
In the standard human model, the egg contributes an X chromosome. If the fertilising sperm also carries X, the zygote receives X from each parent, giving the combination XX. This combination is typically associated with a female child, so option A is correct. A Y-bearing sperm would produce XY, which is why options B and D do not fit the stated condition.
Frequently asked questions
What is the correct answer to this question?
Female child
Why is this the correct answer?
In the standard human model, the egg contributes an X chromosome. If the fertilising sperm also carries X, the zygote receives X from each parent, giving the combination XX. This combination is typically associated with a female child, so option A is correct. A Y-bearing sperm would produce XY, which is why options B and D do not fit the stated condition.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Heredity and Evolution. Topic: Sex determination.
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