If the sperm containing an X chromosome fertilises the egg, it will result in a __ child with an __ combination.

Question

Xy male

and

XX female

Answer 1

The child will be a female with an XX combination. Why?

because a child always gets one X from its mother. mothers can only provide X.

And it gets either an X or Y from it father. Therefore, the fathers sperm determines the gender.

Answer 2

A sperm containing the X copy of the sex chromosome fertilizing an egg will result in a female child with the genotype XX.

This is because egg cells can only contain a copy of an X chromosome, as they were created by the mother who had a genotype XX. Sperm cells can pass down either X or Y from the father, who had genotype XY. In this case though, we are only talking about sperm cells containing an X chromosome. So this combination will only result in female children with XX.

Answer 3

Hi! The egg can only contain an X chromosome so the combination of genes in the fertilized egg is determined by the sperm. If the sperm is carrying an X chromosome the fertilized egg will have two, giving it an XX, female combination.