12 May 2010 Wednesday

12 May 2010 Wednesday - 3. G1: a. Growth of cell b....

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Lecture notes genetics 12 May 2010 Gene transmission in Eukaryotes 1. Transmission genetics: how genes are inherited (transmitted from one generation to the next) a. Homozygous: possess 2 copies of the same allele of a particular gene (AA or aa) b. Heterozygous: possessing 2 different alleles of a particular gene (Aa) c. Hemizygous: possessing only 1 copy of an allele because you possess only one copy of the chromosome containing that allele Mitosis 2. Function of mitosis: to produce 2 daughter cells containing same types and numbers of chromosomes (+genes) as parent cell 3. Mitosis is involved in somatic cell division 4. When does mitosis occur? a. Asexual reproduction of single celled organisms b. During growth of organisms c. Repair of tissue, replacement of cells Cell cycle: 1. Divided into Mitosis, G1, S, G2 2. Mitosis: a. Apportionment of chromosomes to 2 daughter cells
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Unformatted text preview: 3. G1: a. Growth of cell b. Synthesis of molecules, organelles 4. S: a. DNA synthesis b. Chromosome replication 5. G2: a. Additional growth Stages of mitosis: 1. Prophase a. Chromosomes begin to condense b. Spindle apparatus is assembled c. Nuclear membrane begins to disintegrate 2. Metaphase a. Chromosomes line up individually along the equator 3. Anaphase a. Centromeres divide b. Daughter chromosomes begin to move to opposite poles 4. Telophase a. Chromosomes complete movement to opposite poles b. Nuclear membrane begins to reform c. Spindle apparatus disintegrate d. Chromosomes decondense 5. Cytokinesis a. Cell division 6. The result of mitosis is 2 identical daughter cells, each daughter cell contains the same types and numbers of chromosomes as parent cell, but in unreplicated state....
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This note was uploaded on 02/17/2012 for the course BIO 1130 taught by Professor Simpson during the Fall '11 term at Texas State.

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12 May 2010 Wednesday - 3. G1: a. Growth of cell b....

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