1. Bonus #1 and #2 are posted.
Discussions start this week Th and F.

2. CB 17.3
Protein

3. For life to exist, the information (genes) must be passed on.
CB 13.5
{Meiosis:
producing gametes}
For life to exist, the information (genes) must be passed on.
{Mitosis:
producing more cells}

4. How does sexual reproduction generate genetic diversity?
Asexaul
Reproduction
Sexaul
Reproduction
vs.
extremely low
genetic diversity
greater genetic
diversity
How does sexual reproduction generate genetic diversity?

6. Gene for growth hormone Gene for hair color Gene for hemoglobin
Allele for
low express
(short)
Allele for
black hair
Allele for
sickle cell Hb
Gene for
growth hormone
Gene for
hair color
Gene for
hemoglobin
Diploid
chromosomes
Allele for
high express
(tall)
Allele for
black hair
Allele for
normal Hb

7. Each pair of chromosomes is comprised of a paternal and maternal chromosome

8. Two processes generate genetic diversity during sexual reproduction.
Asexaul
Reproduction
Sexaul
Reproduction
vs.
extremely low
genetic diversity
greater genetic
diversity
Two processes generate genetic diversity during sexual reproduction.

9. Crossing-over:
Proteins in the cell cut and religate the DNA, increasing the genetic diversity in gametes.
CB 13.11

10. CB 13.11
Crossing-over:
Proteins in the cell cut and religate the DNA, increasing the genetic diversity in gametes.

11. 2 possibilities for each pair, for 2 pairs
CB 13.10
Independent Assortment
2 possibilities for each pair, for 2 pairs
22 = 4 combinations

12. 2 possibilities for each pair, for 23 pairs
CB 13.10
Independent Assortment
2 possibilities for each pair, for 23 pairs
223 =
8,388,608
combinations

13. CB 13.9
Crossing-over
Meiosis:
In humans, crossing-over and independent assortment lead to over 1 trillion possible unique gametes.
(1,000,000,000,000)
Meiosis I
(Ind. Assort.)
Meiosis II
4 Haploid cells, each unique

14. CB 13.8

15. CB 13.8
4 haploid cells

16. CB 13.9

17. CB 13.5
{Producing gametes}
Sexual reproduction creates genetic diversity by combining DNA from 2 individuals, but also by creating genetically unique gametes.
{Producing more cells}

18. CB 13.6
Different organisms have different patterns of haploid and diploid stages

19. Asexual Reproduction genetically identical to parent
(this tree can reproduce both sexually and asexually)

20. Why does sexual reproduction exist?
Cons:
Need two individuals
Hard to find mate
Diseases/Competition
Pros:
Genetic diversity or
Replace damage DNA

21. Plant Evolution: different plants have different ploidy for the different parts of their lifecycle.
CB 29.7

22. CB 29.8 and .12
Haploid
dominant
(algae)
Diploid
dominant
(fern)

23. Why does sexual reproduction exist?
Cons:
Need two individuals
Hard to find mate
Diseases/Competition
Pros:
Genetic diversity or
Replace damage DNA

24. Bonus #1 and #2 are posted.
Discussions start this week Th and F.