Chapter 13 Meiosis and Sexual Life Cycles

1. Chapter 13Meiosis and Sexual Life Cycles

2. Concept Check QuestionsOffspring acquire genes from parents by inheriting chromosomes How are the traits of parents (such as hair color) transmitted to their offspring?

3. Concept Check QuestionsOffspring acquire genes from parents by inheriting chromosomes How are the traits of parents (such as hair color) transmitted to their offspring?

4. Concept Check QuestionsOffspring acquire genes from parents by inheriting chromosomes In the absence of mutation, asexually reproducing organisms produce offspring that are genetically identical to each other and to their parents. Explain.

5. Concept Check QuestionsOffspring acquire genes from parents by inheriting chromosomes In the absence of mutation, asexually reproducing organisms produce offspring that are genetically identical to each other and to their parents. Explain.

6. Concept Check QuestionsOffspring acquire genes from parents by inheriting chromosomes In organisms that reproduced sexually, how similar are the offspring to their parents? Explain.

7. Concept Check QuestionsOffspring acquire genes from parents by inheriting chromosomes In organisms that reproduced sexually, how similar are the offspring to their parents? Explain. 50%

8. Concept Check QuestionsOffspring acquire genes from parents by inheriting chromosomes In organisms that reproduced sexually, how similar are the offspring to their parents? Explain. 50%

9. Concept Check QuestionsOffspring acquire genes from parents by inheriting chromosomes In organisms that reproduced sexually, how similar are the offspring to their parents? Explain. 50%

10. Concept Check Questions Fertilization and meiosis alternate in sexual life cycles How does the karyotype of a human female differ from that of a human male?

11. Concept Check Questions Fertilization and meiosis alternate in sexual life cycles How does the karyotype of a human female differ from that of a human male?

12. Concept Check Questions Fertilization and meiosis alternate in sexual life cycles How does the alternation of meiosis and fertilization in the life cycles of sexually reproducing organisms maintain the normal chromosome count for each species?

13. Concept Check Questions Fertilization and meiosis alternate in sexual life cycles diploid diploid

14. Concept Check Questions Fertilization and meiosis alternate in sexual life cycles diploid meiosis haploid haploid meiosis diploid

15. Concept Check Questions Fertilization and meiosis alternate in sexual life cycles diploid meiosis haploid fertilization diploid haploid meiosis diploid

16. Concept Check Questions Fertilization and meiosis alternate in sexual life cycles Dog sperm contain 39 chromosomes. What are the haploid number and diploid number for dogs?

17. Concept Check Questions Fertilization and meiosis alternate in sexual life cycles Dog sperm contain 39 chromosomes. What are the haploid number and diploid number for dogs? n=39 2n=78

18. Concept Check Questions Fertilization and meiosis alternate in sexual life cycles What process (meiosis or mitosis) is more directly involved in the production of gametes in animals? In plants & most fungi?

19. Concept Check Questions Fertilization and meiosis alternate in sexual life cycles What process (meiosis or mitosis) is more directly involved in the production of gametes in animals? In plants & most fungi? meiosis mitosis

20. Concept Check QuestionsMeiosis reduces the number of chromosome sets from diploid to haploid Using the concept of chromosome sets, explain briefly how mitosis conserves chromosome number, whereas meiosis reduces the number of chromosomes by half.

21. Concept Check QuestionsMeiosis reduces the number of chromosome sets from diploid to haploid 2 sets mitosis 2 sets 4 sets 2 sets

22. Concept Check QuestionsMeiosis reduces the number of chromosome sets from diploid to haploid 1 set 2 sets meiosis 1 set 2 sets 4 sets 1 set 2 sets 1 set

23. Concept Check QuestionsMeiosis reduces the number of chromosome sets from diploid to haploid How are the chromosomes in a cell at metaphase of mitosis similar to and different from the chromosomes in a cell at metaphase of meiosis II?

24. Concept Check QuestionsMeiosis reduces the number of chromosome sets from diploid to haploid How are the chromosomes in a cell at metaphase of mitosis similar to and different from the chromosomes in a cell at metaphase of meiosis II? Twice as many, otherwise identical

25. Concept Check QuestionsGenetic variation produced in sexual life cycles contributes to evolution Fruit flies have a diploid number of 8, and honeybees have a diploid number of 32. Assuming no crossing over, is the genetic variation among offspring from the same two parents likely to be greater in fruit flies or in honeybees? Explain.

26. Concept Check QuestionsGenetic variation produced in sexual life cycles contributes to evolution Fruit flies have a diploid number of 8, and honeybees have a diploid number of 32. Assuming no crossing over, is the genetic variation among offspring from the same two parents likely to be greater in fruit flies or in honeybees? Explain. 232 > 28

27. Concept Check QuestionsGenetic variation produced in sexual life cycles contributes to evolution Under what circumstances would crossing over during meiosis not contribute to genetic variation among daughter cells?

28. Concept Check QuestionsGenetic variation produced in sexual life cycles contributes to evolution Under what circumstances would crossing over during meiosis not contribute to genetic variation among daughter cells? Parent is homozygous for every gene. .