Connecting Meiosis and Genetics

Meiosis Video

Indentify the following phases of Meiosis

Phase 1 ______		Phase 2 _________
Phase 3 ______		Phase 4_______
Phase 5 ______		Phase 6 ________
Phase 7 _____

8. In what phase of meiosis do the chromatids break apart?___________________________________.

9. In what phase(s) of meiosis is (are) there four times as many chromosomes as normal? ______________________

10. In the final phase of meiosis, the cells are (tetraploid, diploid or haploid)? _________________________________

11. In the last phase of meiosis, how many of the resulting cells are identical?_____________________________________

12. In what cells does meiosis occur in people? ____________________________________________

13. What is a zygote? __________________

14. In which process (mitosis, meiosis,or both) does crossing-over occur?____________________________

15. Alternate forms of a gene are called__________________

16. Two genes which are the same are (heterozygous or homozygous)______________.

17. The actual appearance of a trait is called its______________________________.

18. The genetic makeup of a trait is called its ________________________________.

19. Of all the chromosomes you have in each cell, what percentage is from the your father?___________________________

20. A cross involving a simple dominant and recessive trait, where both parents are heterozygous, what would be the phenotype ratio? __________

21. A cross involving an incompletely dominant trait where both parents are heterozygous, what would the resulting phenotype ratio be? __________________

22. If a disorder is completely recessive (tt), what must the normal parents be in order for the child to show the disorder? Father ________ Mother _______

23. If attached ear lobes (l) is recessive and free ear lobes (L) is dominate, what would the parents genetic makeup be for both attached and free ear lobes to show up in the children? Father ____________ Mother _______________

24. Can an egg cell contain paternal chromosomes? _____________________

25. What is the centromere? ______________________

26. In humans, assume brown eyes (B) are dominant over blue eyes (b). A blue eye woman marries a brown eyed male who's father was blue eyed. Give the following genetic make up for the wife and husband and their possible children.

27. An example of co-dominance is blood type. There are four types of blood, A, B, AB and O. Fill out the missing genotypes in the table below.

28. Name the universal blood type donar (can be given to anyone) __________________

29. Name the universal blood type receiver (can be received from anyone) ___________

30. Which blood type shows the co-dominace the best? _______________