Mitosis meiosis powerpoint.ppsx

1,977 views
1,710 views

Published on

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
1,977
On SlideShare
0
From Embeds
0
Number of Embeds
26
Actions
Shares
0
Downloads
28
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Mitosis meiosis powerpoint.ppsx

  1. 1. Words to think about in this unit.<br />Mitosis<br />Meiosis<br />Chromosomes<br />Chromatids<br />Homologous chromosomes<br />Cell cycle<br />Cancer<br />Haploid vs. diploid<br />Somatic cells versus germ line cells<br />
  2. 2. Mitosis and Meiosis<br />Sea star morula<br />
  3. 3.
  4. 4. Sea Urchin Development<br />
  5. 5. In prokaryotes, cell division is simple= Binary Fission forms 2 daughter cells<br />Single circular DNA molecules<br />
  6. 6. Binary Fission<br />
  7. 7. Different story for Eukaryotes… WHY?<br />Bigger<br />More DNA many linear chromosomes<br />Packaged differently than prokaryotes<br />Chromosome= long DNA molecule packaged with proteins (called ____________)into compact shape. <br />
  8. 8. OVERVIEW <br />Chromosomes composed of CHROMATIN= Protein and DNA<br />1 human chrom= 140 million nucleotides<br />1 chromosome stretched out = 2 inches<br />
  9. 9. Mitosis and Meiosis<br />Mitosis: cell ÷ in somatic cells<br />Meiosis: cell ÷ in germ cells<br />
  10. 10. Cell cycle- cell division and the events that prepare a eukaryotic cell for division<br />
  11. 11. Chromosome<br />When chromosomes replicate, form IDENTICAL sister chromatids. <br />Centromere-connects 2 sister chromatids<br />
  12. 12. Homologous<br /><ul><li>Chromosomes (replicated or not) exist in homologous pairs-
  13. 13. Each member of pair carries SIMILAR info!
  14. 14. Cells with homologous chromosomes= diploid cells</li></li></ul><li>Human karyotype<br />
  15. 15. Diploid(2n) versus haploid(n)<br />
  16. 16. QUIZ<br />
  17. 17. QUIZ<br />In the cell cycle, what does “S” stand for?<br />What is the definition of somatic cell?<br />What does this picture represent?<br />
  18. 18. Mitosis<br />
  19. 19. Mitosis<br />
  20. 20.
  21. 21. Meiosis<br />
  22. 22. Meiosis<br />
  23. 23. Mitosis versus meiosis<br />
  24. 24. Independent Assortment<br />
  25. 25. Crossing over<br />
  26. 26. Nondisjunction in meiosis I<br />
  27. 27. Nondisjunction in meiosis II<br />
  28. 28. Fertilization after nondisjunction<br />

×