Which sex chromosomes are normally found in a human male?
Answer and explanation
Correct answer: One X and one Y chromosome
The governing concept is the XX–XY system of human sex determination. A typical human male has one X chromosome and one Y chromosome, represented as XY. The mother contributes an X-bearing ovum, while the father contributes either an X- or Y-bearing sperm. XX is the usual female combination; YY is not a normal viable human combination, and XXX is not the standard male pattern. Therefore A is correct.
Frequently asked questions
What is the correct answer to this question?
One X and one Y chromosome
Why is this the correct answer?
The governing concept is the XX–XY system of human sex determination. A typical human male has one X chromosome and one Y chromosome, represented as XY. The mother contributes an X-bearing ovum, while the father contributes either an X- or Y-bearing sperm. XX is the usual female combination; YY is not a normal viable human combination, and XXX is not the standard male pattern. Therefore A is correct.
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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