Genetic

Genetic - Genetic 46 chromosomes and 23 pairs in human dna...

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Genetic 46 chromosomes and 23 pairs in human dna Autosomes 1-22 Sex chromosomes 23 (x and y) 2 main cells: somatic and sex cells Somatic Cells: components of body tissues, most cells in humans, diploid 23 pairs Sex cells (gametes): ova, egg produced female ovaries, sperm, sex cells produced in male testes, 23 chromosomes in humans, haploid one of each pair; zygote-union between sperm and ovum Mitosis-cell divison of somatic cells, occurs during growth and repair of tissues, result of this process is 2 identical daughter cells, genetically identical to original cells (diploid cells) Steps: Interphase, prophase, metaphase, anaphase, telophase Interphase: DNA replication Prophase: 2 identical sister chromatids Metaphase: chromosomes line up along equater of cell Anaphase: sister chromatids separate Telophase: 2 daughter cells with identical genetic material Meiosis: production of gametes; 2 rounds of division that result in 4 daughter cells, each with 23 chromosomes; fertilization of sperm and
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This note was uploaded on 02/13/2011 for the course ANTH 002 taught by Professor Grinker during the Fall '08 term at GWU.

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Genetic - Genetic 46 chromosomes and 23 pairs in human dna...

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