final-ppt-Genetics-Report.pptx akabksnakanzks

ppt for genetics

1. Homologous chromosomes Chromosomes Diploid Haploid Alleles Mitosis Meiosis 1 Meiosis 2 Chromatids Spindle fibers Nuclear envelope Cytoplasm Are you familiar with this different TERMS?

2. Mitosis is a process of cell division in which a single cell divides to produce two identical daughter cells. Mitosis occur Somatic cells for growth, repair, and maintenance of tissues and organs.

3. The chromatin condensed together to create visible chromosomes .

4. The spindle fibers also begin to form Migration of the two pairs of the centrioles to the opposite sides of the cell. Thinning and gradual disappearance of nuclear envelope .

5. Metaphase is marked by the alignment of all the chromosomes at the equatorial plane of the cell (the metaphase plate). The nuclear membrane dissolves completely, marking the beginning of metaphase. Attachment of the the spindle fibers to the centromere of the chromosome at a point called kinetochore.

6. Movements of the chromosomes occurs due to shortening of spindle microtubules and kinetochore movement along the spindle fibers.

7. Migration and arrival of the new chromosomes to the opposite poles of the cell.

8. During this stage, daughter chromosomes arrive at opposite poles of cell and the spindle fibers disappear. The chromosomes change into chromatin and become invisible under the light microscope. Nuclear envelope begins to form around the new nuclei.

9. Cytokinesis or cleavage of the cytoplasm of the cell begins.

10. Meiosis is a type of cell division that occurs in sexually reproducing organisms to produce gametes (sperm and egg cells). It involves two successive divisions that result in four daughter cells

11. Meiosis I begins with one diploid parent cell and ends with two haploid daughter cells. This results in halving the number of chromosomes in each cell. Meiosis II starts with two haploid parent cells and ends with four haploid daughter cells.