Question

This is the biological determination system for the sex of an offspring.

Answer 1

x & Y chromosomes determine their sex

Step-by-step explanation:

XX = Female

XY = Male

The way sex is determined is by the sperm cell, which may contain eithr X or Y chromosomes while the ovaries/eggs are always X

Answer 2

chromosomes, the X and the Y.

Step-by-step explanation:

Egg cells all contain an X chromosome, while sperm cells contain an X or Y chromosome. This arrangement means that it is the male that determines the sex of the offspring when fertilization occurs.