What is the combination of sex chromosomes in a human male?
Answer and explanation
Correct answer: XY
In the usual human XX–XY system, a male has two unlike sex chromosomes: one X and one Y. The combination is therefore written as XY. The mother contributes an X chromosome, while a Y-bearing sperm from the father produces the XY combination. Option A is correct. XX is the usual female combination, YY is not a standard viable human combination, and XXX is a sex-chromosome variation rather than the usual male pattern.
Frequently asked questions
What is the correct answer to this question?
XY
Why is this the correct answer?
In the usual human XX–XY system, a male has two unlike sex chromosomes: one X and one Y. The combination is therefore written as XY. The mother contributes an X chromosome, while a Y-bearing sperm from the father produces the XY combination. Option A is correct. XX is the usual female combination, YY is not a standard viable human combination, and XXX is a sex-chromosome variation rather than the usual male pattern.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Heredity and Evolution.
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