In human sex determination, the sex of a child is decided by the chrom…

Question

In human sex determination, the sex of a child is decided by the chromosome contributed by the:

Accepted Answer

A. Father, who gives X or Y

1. The mother always contributes an X chromosome through the ovum.
2. The father contributes either an X or a Y chromosome through the sperm.
3. An X from the father gives XX (girl); a Y gives XY (boy), so the father determines the sex.
4. The other options give the deciding role or chromosomes to the mother or fix the father at X, all wrong, so they are ruled out.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 3 "Life Processes in Living Organisms Part 2", p.40_

Answer

Mother, who gives X or Y

Answer

Mother, who gives only Y

Answer

Father, who gives only X

In human sex determination, the sex of a child is decided by the chromosome contributed by the:

Keep practising Unit 8J: Comparative Physiology: Transport & Regulation