1. DNA/Genetic Disorder Quiz Review

2. Any change in a gene or chromosome is a:  Pedigree  Mutation  Karyotype  Genome

3. B

4. A mutation is harmful to an organism if it:  Changes the DNA of the organism  Changes the phenotype  Reduces its chance of survival  Makes the organism better able to avoid predators

5. C

6. Which nitrogen base is NOT part of DNA?  Adenine  Guanine  Cytosine  Uracil

7. D

8. What combination of sex chromosomes do males have?  Two X chromosomes  Two Y chromosomes  One Y chromosomes  One X chromosome and one Y chromosome

9. D

10. A chart that tracks which members of a family have a particular trait is called a:  Karyotype  Pedigree  Punnett sqaure  Genome

11. B

12. A genetic disorder in which a person’s blood clots very slowly if at all is:  Sickle-cell disorder  Cystic fibrosis  Down’s syndrome  Hemophilia

13. D

14. The __________ chromosome determine if a person is a male or female.  Multiple  Sex  Recessive  Gene

15. B

16. An abnormal condition that a person inherits through genes or chromosomes is a :  Pedigree  Gene therapy  Genetic disorder  Karyotype

17. C

18. DNA is __________material that carries information about a organism and is passed from parent to offspring.  Phosphate  Genetic  Helix  Protein

19. B

20. Hemophilia is an X-linked recessive trait. Do a cross for a normal father and a mother who is a carrier of hemophilia. Typically blood clotting – H Hemophilia - h

21. Check answers hanging next agenda X

22. What is the probability that they will have a child with hemophilia?

23. 25%

24. What is the probability that they will have a child who is a carrier of the gene?

25. 25%

26. Hemophilia is an X-linked recessive trait. Do the cross for a father with hemophilia and a mother who is normal.

27. Check answers hanging next to agenda.

28. What is the probability that they will have a girl with hemophilia?

29. 0%

30. What is the probability that they will have a child who is a carrier of the gene?

31. 50%

32. How many carriers are there in this pedigree?

33. 4

34. How many females have the trait?

35. 1

36. Is this pedigree sex-linked? Explain how you know.

37. This pedigree could be sexlinked because there are no males carriers. In sex linked pedigrees, males cannot be carriers because the Y does not carry an allele.

38. What does this karyotype show?  A female with down’s syndrome  A male with down’s syndrome.  A normal male  A normal female

39. C

40. A change in the chromosomes can cause a genetic disorder. True or False?

41. true

42. A picture of all the chromosomes in the cell is called a:  Pedigree  Genotype  Karyotype  Phenotype

43. C