BIOB 375 1st Edition Lecture 14 Outline of Last Lecture II. Cell Divisionsa. Growthb. ReproductionOutline of Current Lecture III. Cell Divisiona. Differences between Mitosis and MeiosisCurrent LectureThree fundamental events in cell division:Copying of genetics material Replication- In both mitosis and meiosis Equally dividing of genetics material- Mitosis and Meiosis 1&2Dividing of cell* Know which part of cell undertakes a type of cell division? What is the result?Mitosis- Happens in somatic cells: to increase cell number or to replace dead cells- G1SG2 ProphaseMetaphaseAnaphaseMeiosis- Created gametes for sexual reproduction- Meiosis also has interphase G1-S-G2- Meiosis 1 Chromosome number reduce in half, but amount of DNA molecules are thesame as another cell- Meiosis 2 Both chromosome number and DNA molecules reduce in half- Homologs chromosome chromosomes that have same gene trait from each parent in same location on chromosome (ex. Hair color, or hand size)- Four daughter cells- Prophase 1 events don’t happen in MitosisMajor differences- Cell type- Chromosome number- VariationYou are expected to be able to:- Identify type of cell division and stages of cell divisionWhere are the cells that could be under mitosis?Where are the cells that could be under meiosis?- Stamen and Ovary of a plant- Ovary (Oogonia cell) and Testis (Spermatogonia cell) of a humanImportant:Mitosis- Type of cell Somatic cells- Mitosis produces genetically identical cells- All the somatic cells of an individual have identical genetic materialMeiosis- Cell typeso Microsporocyteo Magasporocyteo Spermatogoniao Oogonia- Meiosis produces 4 different gametes with half of the chromosome number of the mother cells, enhances genetic
View Full Document
Unlocking...