Question

the gender of the individual is determined at __________.a birthb the third monthc fertilizationd gastrulation

Explanation:

Gender is determined by the combination of sex chromosomes from the sperm and egg at fertilization. The sperm can carry either an X or Y chromosome, while the egg always carries an X chromosome. If the sperm contributes an X chromosome (XX), the individual will be female. If it contributes a Y chromosome (XY), the individual will be male. This genetic determination occurs at the moment of fertilization.

Answer:

C. fertilization