Question

What are XX and XY chromosomes?

Answer 1

Chromosomes of humans of course...

Explanation:

`"XX"` and `"XY"` are the sex chromosomes of females and males, respectively. This is the usual case for humans. However, some times, people can get genetic mutations which cause them to have extra chromosomes, with combinations like `"XXY"` or `"XYY"`. That was a short introduction to sex chromosomes.

Hope this helped!