mitosis[1].meiosis

mitosis[1].meiosis - a Fertilization Event is Determined by...

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Rule of Segregation - Alleles on the same locus on separate members of a homologous chromosome pair will segregate into separate gametes during meiosis. A A a a Diploid Sperm Stem Cell DNA Replication Meiosis 1/2 1/2 Haploid Gametes
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Rule of Independent Assortment - Homologous chromosome pairs line up randomly and independently of one another during metaphase I of meiosis. A A a a B b A A a a b b B B A A a a B B b b OR b B A B a b 1/4 1/4 1/4 1/4
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Together, the Rules of Segregation Independent Assortment Generate Genetic Variability Among Gametes Number of Different Combinations of Homologous Pair Members = 2 N ( N = # of Homologous Pairs) Diploid # of Chromosomes # of Unique Combinations in Gametes 2 4 6 22 46 2 1 = 2 2 2 = 4 2 3 = 8 2 11 = 2048 2 23 = 8,388,608
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Additional Contributors to Genetic Variability - Random Fertilization : Each Gamete has an Equal Probability of Success! The Likelihood of 2 Specific Gametes being Involved in
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Unformatted text preview: a Fertilization Event is Determined by a Law of Probability: ‘ The Probability of Two Independent Events Occurring Simultaneously is Equal to The Product of Each Occurring Individually.’ 1/8,388,608 1/8,388,608 X = 1 / 70,368,744,177,664 In Humans, the chance of Any 2 Given Gametes Being Involved in Fertilization (assuming no crossing over) = 70.4 trillion to 1 Additional Contributors to Genetic Variability-Crossing Over : Generates New Combinations of Alleles on Chromosomes Genes Located on the Same Chromosome are Said to be Linked The Closer the Proximity of 2 Genes, the Stronger the Linkage Peas and Mathematics are my Life …oh, so is God!! Gregor Medel (1822 – 1884)...
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This note was uploaded on 04/26/2008 for the course NTSC 118 taught by Professor Peterson during the Spring '05 term at Loyola Chicago.

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mitosis[1].meiosis - a Fertilization Event is Determined by...

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