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Unformatted text preview: Meiosis 06/03/2008 09:18:00 Outline Purpose Meiosis I o Separate homologous chromosomes Meiosis II o Separate chromatids Spermatogenisis Oogenesis 3 ways to get variation compare meiosis with mitosis Production of the ovum and sperm Creates diversity because of certain characteristics in common with mother and father but you are not exactly the same. Male-occurs in testis Female-occurs in ovary Fig. 12.4 Sister chromatids held together by a centromere In meiosis we start out with two chromosomes called homologous chromosomes one from mother one from father Homologous chromosomes are made up from one from mother and one from father they have the same info on them but in a different form Sister chromatids are the replicated chromosomes Nonsister chromatids have the same gene but in different forms Two copies of each chromosome are called diploid organisms. Meiosis-go from one to four cells that contain half the amount of genetic material started with....
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This note was uploaded on 04/17/2008 for the course BY 123 taught by Professor Cusic during the Spring '07 term at University of Alabama at Birmingham.
- Spring '07