Question

The human X and Y chromosomes _____.

A) are both present in every somatic cell of males and females
B) are the same size and have the same number of genes
C) include genes that determine an individual's sex
D) are called autosomes

Answer 1

The human X and Y chromosomes determine an individual's sex. Females have two X chromosomes (XX), while males have one X and one Y chromosome (XY). The X and Y chromosomes are not the same size and do not have the same number of genes.

Step-by-step explanation:

The human X and Y chromosomes determine an individual's sex. Females have two X chromosomes (XX), while males have one X and one Y chromosome (XY). The X and Y chromosomes are not the same size and do not have the same number of genes. The X chromosome is larger and carries about 2,000 genes, while the Y chromosome is smaller and carries fewer than 100 genes, with only a single Y chromosome gene, called SRY, determining male development.