1. What gender is XX
female

2. What gender is XY
male

3. What type of sex chromosome does a human female egg produce

4. ? # chromosomes are in a normal human karyotype46

5. ? # autosomes in a normal human karyotype44

6. What chromosomes are sex-linked genes located on
X and Y

7. What is the failure of chromosomes to separate during meiosis called
nondisjuntion

8. What chromosome has vital normal development genesX

9. Has any baby ever been born without an X chromosomeNo

10. If _________ happens during meiosis, some gametes may have an extra copy of a gene
nondisjuntion

11. If nondisjuntion occurs during meiosis, some gametes may have an extra copy of what? Some genes

12. What project is an attempt to sequence the DNA of every human gene?
Human Genome

13. More than 40% of the proteins coded for in the human genome are similar to proteins found where?
other organisms

14. What is the probability that a human offspring will be male?50

15. What is the probability that a human offspring will be female?50

16. What % of human sperm carry an X chromosome? 50

17. What % of human sperm carry a Y chromosome?50

18. Is colorblindness more common in males or females

19. Is colorblindness dominant or recessive?

20. Which chromosome is colorblindness located onX

21. Which chromosome may form Barr bodiesX
On what gender?
a female

22. If Dd is heterozygous dominant, what is dd
Homozygous recessive

23. Has at least one recessive trait (heterozygous)
If a child expresses recessive, what do you know about each parent (both parents express dominant)
Has at least one recessive trait (heterozygous)

24. how many generations are shown in the pedigree3

25. What is your genotype if your phenotype is not dominant
Homozygous recessive

26. When during a persons life would Huntington’s disease symptoms appear
late

27. What is sickle cell disease caused by
Change In 1 allele

28. What does hemoglobin in red blood cells do?
Carry oxygen

29. Generally healthy; some normal hemoglobin in red blood cells
What would be the affect of a person who is heterozygous for sickle cell
Generally healthy; some normal hemoglobin in red blood cells