Home › Maharashtra SSC (Class 10) › Biology › Life Processes in Living Organisms Part 2 › In human sex determination, the sex of a child i…
In human sex determination, the sex of a child is decided by the chromosome contributed by the:
AFather, who gives X or Y
BMother, who gives X or Y
CMother, who gives only Y
DFather, who gives only X
Answer & Solution
Correct 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_
Related questions
Syphilis and gonorrhoea, two common sexually transmitted diseases, are caused by:Which statement about dizygotic twins is correct?Monozygotic twins arise from a single embryo whose cells divide into two groups within aboIn surrogacy, the woman in whose uterus the couple's embryo is implanted is called the:In the IVF technique, where is fertilization brought about?After ovulation, the remaining tissue of the burst follicle forms the corpus luteum, whichIn the menstrual cycle, the bursting of the mature follicle to release the oocyte is triggWhich organ forms in the uterus to supply food material to the developing embryo?