Question

Which of the following statements about sex chromosomes is true? Select all that apply.

A. Males have XX chromosomes
B. Females have XY chromosomes
C. Sex determination is solely based on the mother's chromosomes
D. Y chromosome carries genes for male characteristics

Answer 1

Females have two X chromosomes (XX) and males have one X chromosome and one Y chromosome (XY). The Y chromosome carries genes for male characteristics.

Step-by-step explanation:

Each individual has two sex chromosomes; females have two X chromosomes (XX), while males have one X chromosome and one Y chromosome (XY). Sex determination is not solely based on the mother's chromosomes, as the father's chromosomes also play a role. In mammals, including humans, sex is determined by the presence of XX in females and XY in males. The Y chromosome carries genes for male characteristics, such as the SRY gene, which triggers the embryo to develop into a male.