Separate as they are pulled to opposite poles by

separate as they are pulled to opposite poles by
microtubules attached to the centromeres

Paired chromatids held by centromeres remain
together
o
Telophase I/Cytokinesis

Similar to that of mitosis
o
At the end of meiosis I, the resulting
cell contains the haploid number of
chromosomes
o
Summary:

Begins with a diploid starting cell and ends with two cells,
each with the haploid number of chromosomes

Meiosis II
o
Prophase II, Metaphase II,
Anaphase II, Telophase II

Similar to Mitosis: Centromeres split, sister chromatids
separate and move to opposite poles of the cell
o
Summary:


Each of the two haploid cells formed during meiosis I
divides
o
Net result: is four haploid gametes that are genetically
different from the original diploid staring cell

3.8 Cellular Diversity

Cells have different shapes and sizes

3.9 Aging and Cells

Aging
o
Geriatrics
o
Gerontology
o
Telomeres

Cancer
o
Tumor

Neoplasm

Malignant tumor/malignancy

Metastasis

Benign tumor

Types
o
Carcinomas
o
Melanomas
o
Sarcoma
o
Osteogenic sarcoma
o
Leukemia
o
Lymphoma

Growth/spread
o
Angiogenesis

Causes
o
Carcinogen
o
Mutations

o
Oncogenes
o
Proto-oncogenes
o
Oncogenic viruses

Carcinogenesis

Treatment
o
Surgery
o
Chemotherapy
o
Radiation therapy
o
virotherapy