Across
- 3. XY
- 6. How traits are how traits are passed down from parents to
- 8. Children come from separate ova and sperm
- 10. contain genes that determine physical and mental characteristics
Down
- 1. XX
- 2. Overrules the other
- 4. unit of heredity
- 5. is determined at point of fertilization
- 7. Occur when, soon after fertilization, the dividing cells separate into 2 embryos
- 9. Can be overruled