Which sex chromosome does a human child always receive from the mother?
Answer and explanation
Correct answer: X chromosome
The governing concept is that human females normally have XX chromosomes. During egg formation, each ovum receives one sex chromosome, and because the mother has only X chromosomes, every ovum carries X. The father’s sperm carries either X or Y, so the child receives X from the mother in every case and the paternal chromosome determines whether the combination is XX or XY. Therefore option A is correct.
Frequently asked questions
What is the correct answer to this question?
X chromosome
Why is this the correct answer?
The governing concept is that human females normally have XX chromosomes. During egg formation, each ovum receives one sex chromosome, and because the mother has only X chromosomes, every ovum carries X. The father’s sperm carries either X or Y, so the child receives X from the mother in every case and the paternal chromosome determines whether the combination is XX or XY. Therefore option 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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