Explain the sex determination in human beings with help of cross.
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Human beings have XX_XY sex determination system. In this, the males have XY sex chromosomes. They produce two types of gametes having X and Y chromosome. The females have XX chromosome. They produce only one type of gamete having X chromosome. The sex of a child is determined by the type of chromosome he/she receiving from the father. If sperm is having X chromosome, then the child will be a girl. If sperm is having Y chromosome, then the chilld will be a boy. The Y chromosome carries factors responsible for triggering male development. The X chromosome carries factors responsible for triggering female development.
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