1. Chapter 12 Review Sheet

2. What are the sex chromosomes? X Y

3. Sex Chromosomes of females? XX

4. Sex Chromosomes of Males XY

5. A mutation where a piece of one chromosome breaks off and attaches to another chromosome translocation

6. A change in a gene due to incorrect copying mutation

7. A diagram of a family and the occurrence of traits pedigree

8. Blood type is controlled by ______________ alleles multiple

9. What is genetic counseling? Risks for having kids Should they even have kids? Check with pedigrees and punnett squares

10. What kind of trait is found in EVERY generation? Dominant trait

11. If both parents have a recessive trait, what is the chance that their kids may have it too? 25% (1 out of 4)

12. Type of trait that occurs mostly in males Sex-linked

13. Examples of sex-linked disorders color-blindness hemophilia

14. Who determines the sex of children? father

15. Too many or too few chromosomes nondisjunction

16. When you replace a defective gene with a healthy gene Gene therapy

17. A person who is heterozygous for a trait is also called a carrier

18. What is hemophilia Blood clotting disorder

19. What causes Down syndrome? 3 #21 chromosomes

20. Punnett Square with 2 parents that have a recessive gene (not sex-linked)

21. Males determine sex-how?

22. Punnett Square that has sex-linked trait

23. What is Down Syndrome and how can a karyotype show you that?

24. Know how to match children with parents based on blood type.