1. WCH 1.120Exam #1 F 2/16 in WCH 1.120 (bring cheat sheet) Review Th 2/15 at 5pm in TBA Homework #1 due at noon

2. CB 6.2

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

4. CB 5.27 DNA replication: Each strand serves as a template for producing a complementary copy, but the replication is not always perfect.

5. CB 12.5 Cell Division (AKA: DNA replication)

6. CB 12.4 Mitosis: A DNA Perspective

7. Mitosis plays a role in: Growth and Development Repair and Turnover of Cells Reproduction –Asexual CB 12.2

8. Normally DNA is loosely packaged During mitosis DNA is tightly packaged as chromosomes and individually visible CB12.6

9. CB 12.4 Mitosis: A DNA Perspective

10. CB 12.6 start of mitosis

11. Sexual reproduction creates genetic diversity by combining DNA from 2 individuals, but also by creating genetically unique gametes. CB 13.5 {Mitosis: producing more cells} {Meiosis: producing gametes}

12. CB 14.4 Gene for blue eye pigment Gene for brown hair pigment Gene for growth hormone Haploid chromosomes Gene for hemoglobin Gene for DNA polymerase

13. CB 14.4 Gene for hemoglobin Gene for hair color Gene for growth hormone Allele for black hair Allele for black hair Allele for low express (short) Allele for high express (tall) Allele for normal Hb Allele for sickle cell Hb Diploid chromosomes

14. CB 13.3 Each pair of chromosomes is comprised of a paternal and maternal chromosome

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

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

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

18. Crossing-over Meiosis I Meiosis II (Ind. Assort.) 4 Haploid cells, each unique Meiosis: In humans, over 1 trillion possible unique gametes. (1,000,000,000,000) CB 13.9

19. Differences between mitosis and meiosis

20. Mitosis only: extremely low genetic diversity Meiosis and Mitosis: greater genetic diversity vs. Asexual Reproduction Sexual Reproduction

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

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