What are the sex chromosomes carried by females?

Females carry two identical sex chromosomes, which are referred to as XX. This configuration means that both chromosomes in the pair are the same in terms of size and genetic information they contain, which is a critical aspect of determining sex in many organisms, including humans.

In contrast, males typically have one X and one Y chromosome, known as the XY configuration; the Y chromosome is shorter and carries different genes compared to the X chromosome. The presence of two X chromosomes in females plays a significant role in the expression of certain traits and the continuation of genetic diversity through sexual reproduction.

The options suggesting XY configurations pertain to males and thus do not apply to females, as males have one of each type of sex chromosome (X and Y), leading to the identification of male traits. Furthermore, options with YY configurations are not applicable because there is no known natural occurrence of a female having two Y chromosomes, as it would not facilitate the necessary gene expressions associated with female characteristics. The distinction between the sex chromosomes is essential in understanding genetic inheritance and reproductive biology.