Question

Which of the two, sperm or ovum, decided the sex of the child?​

Answer 1

perm decides the sex of the child. Let us see how:

You know that the sex chromosomes in female are XX and in Male it is XY. In gamete formation(meiosis) one chromosome goes into each cell.

As you can see clearly, the genotype of ovum can only be X but in sperm, it can be either X or Y, therefore during fertilization.

X Y → Male

Female X XX XY

X XX XY

XX- girl

XY- boy

The sperm determines whether the child would be a male or female.

Answer 2

Answer:

Sperm

Explanation:

Sex of the child is determined by the pairing of X and Y chromosomes. The chromosome in the ovum is always X while the sperm can have either X or Y chromosomes. So if the sperm which fertilizes the egg is Y then the child will be a boy, but if the sperm contains a X chromosome then the child will be a girl.

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