Which chromosome combination produces a boy in humans?
Answer and explanation
Correct answer: XY
The governing concept is the human sex-chromosome system. A typical human female has XX sex chromosomes, while a typical human male has XY. The egg contributes X, and a Y-bearing sperm contributes Y, producing the XY combination. Therefore, option B is correct. XX is the usual female combination; YY is not a viable normal human combination, and a single X does not represent the usual diploid chromosome state.
Frequently asked questions
What is the correct answer to this question?
XY
Why is this the correct answer?
The governing concept is the human sex-chromosome system. A typical human female has XX sex chromosomes, while a typical human male has XY. The egg contributes X, and a Y-bearing sperm contributes Y, producing the XY combination. Therefore, option B is correct. XX is the usual female combination; YY is not a viable normal human combination, and a single X does not represent the usual diploid chromosome state.
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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