If a child has XY chromosomes how must this combination have formed?
Answer and explanation
Correct answer: X came from the mother and Y came from the father
The governing concept is the inheritance of sex chromosomes in the XX–XY system. The egg from the mother contributes X, because human eggs normally carry X. A sperm from the father contributes either X or Y. An XY child must therefore receive X from the mother and Y from the father. Option A is correct; the mother does not normally provide Y, and neither parent can provide both chromosomes through one gamete.
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What is the correct answer to this question?
X came from the mother and Y came from the father
Why is this the correct answer?
The governing concept is the inheritance of sex chromosomes in the XX–XY system. The egg from the mother contributes X, because human eggs normally carry X. A sperm from the father contributes either X or Y. An XY child must therefore receive X from the mother and Y from the father. Option A is correct; the mother does not normally provide Y, and neither parent can provide both chromosomes through one gamete.
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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