BSC 108 Lecture Notes - Lecture 13: Nuclear Membrane, Centriole, Chromatin
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22 Feb 2017
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The basis of sexual reproduction: haploid. Homologs chromosomes: different organisms of the same specifies have the same number and types of chromosomes, somatic cell typical body cells. Have 46 chromosomes in somatic cells, matching pairs are called homologs. Each member of the pair is inherited from a different parent there are 2 copies of every gene. Each various of a gene is called allele. Karyotype: a method of organizing the chromosomes of a cell in relation to number size and type the chromosomes are arrested in the metaphase stage of mitosis, photographed and organized, homologous chromosomes are matching pairs of chromosomes. Humans have: two different sex chromosomes x and y, 22 pairs of matching chromosomes are called autosomes this make up the 23 pairs or 46 chromosomes in each somatic cell. Fertilization: results in a zygotes and is the fusion of the egg and sperm. Sexual life cycles involve an alternation of diploid and haploid stage.
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