X and Y Chromosomes
- Created by: sxdewinder`
- Created on: 09-05-15 12:00
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- X and Y Chromosomes
- They control whether your male or female
- All men have an X and a Y chromosome: XY
- All women have two X chromosome: **
- When making sperm, the X and Y chromosomes are drawn apart in the first division of meiosis
- There's a 50% chance each sperm cell gets an X or a Y chromosome
- All eggs have one X chromosome
- Genetic Diagrams
- To find the probability of getting a girl or a boy
- Put the possible gametes from one parent down the side, and those off the other parent along the top
- In the middle fill in the letters from the top and the side
- There are two ** results and two XY results, so there's a 50:50 ratio in pregnancy
- They control whether your male or female
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