1. Meiosis and producing genetically diverse offspring
Bonus #1 and #2 are posted

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. CB 12.4
Mitosis:
A DNA
Perspective

5. Mitosis plays a role in:
Growth and Development
Repair and Turnover of Cells
Reproduction
Asexual

6. The Cell Cycle
CB 12.5

7. start of
mitosis
CB 12.6

8. 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}

9. 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?

11. 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

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

13. sister chromatids= replicated DNA (chromosomes)
tetrad= pair of sister chromatids
CB 13.4

14. Meiosis splits apart the pairs of chromosomes.
CB 13.7
X 23
in humans
Meiosis splits apart the pairs of chromosomes.

15. haploid
X 23
in humans
X 23
in humans
diploid
X 23
in humans
Inheritance = The interaction between genes inherited from Mom and Dad.

16. 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?

17. Meiosis splits apart the pairs of chromosomes.
CB 13.7
X 23
in humans
Meiosis splits apart the pairs of chromosomes.

18. Crossing-over (aka Recombination) CB 13.11 DNA cut and religated

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

20. CB 13.10
Independent Assortment
(aka Random Assortment)

21. 2 possibilities for each pair, for 2 pairs
CB 13.10
Independent Assortment
2 possibilities for each pair, for 2 pairs
22 = 4 combinations

22. 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

23. 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

24. 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?