This page contains polls dedicated to What are X and Y chromosomes?.
If you want to create a poll please feel free to do it by clicking on "Create a Poll" button.

The 23rd pair of genes determines the sex of a baby. These are X and Y chromosomes. A woman has two X chromosomes, while a man has one X and one Y chromosome. When the chromosomes join together in fertilization, if the sperm contains an X chromosome, it will combine with the X chromosome of the female to produce XX - a girl. If the sperm contributes the Y chromosome, the baby will have one X and one Y chromosome and will be XY - a boy. read more...

Tags: sex, baby, chromosomes

Note: All polls have to be approved by the editorial team of FamousWhy before they can appear live on FamousWhy.com.