X and Y chromosomes
- Created by: chelsey866
- Created on: 08-03-14 19:34
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- X and Y chromosomes
- Your chromosomes control whether you're a male or female
- 1) There are 23 pairs of chromosomes in every human body cell
- 2) The 23rd pair are labelled ** or XY
- 3) There are two chromosomes that decide whether you turn out male or female:
- All men have an X and a Y chromosome: XY The Y chromosome causes male characteristics
- All women have two X chromosomes **: Having two Xs female characteristics to develop
- 4) sperm cells have an X or a Y chromosome
- 5) All egg cells have one X chromosome
- Your chromosomes control whether you're a male or female
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