ANT131,5 - HeredityandEvolution MendelianInheritance...

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Heredity and Evolution Mendelian Inheritance Polygenic Inheritance Modern Synthesis Mutation Gene flow Gene drift Darwin’s Dilemma How to produce and maintain variation in a population? Blending reduces variation. Mechanics of inheritance Gregor Mendel Johann Gregor Mendel (1822 – 1884) The Laws of Inheritance (1866) Theory of Particulate Inheritance Principle of Segregation Genes occur in pairs on homologous chromosomes. During meiosis, the gene pairs (alleles) separate into different gametes With fertilization, a gene from one parent unites with the gene from the other  parent, restoring the full compliment. Principle of Independent Assortment The distribution of one pair of alleles into gametes does not influence the  distribution of another pair. The genes controlling different traits are inherited independently of one another This principle only holds for genes located on different chromosomes Genes on the same chromosome are linked Homozygous & Heterozygous
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Homozygous: Both alleles at a given locus are identical (Brown, Brown.) Heterozygous: the two alleles at a given locus are different (orange, Red)
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ANT131,5 - HeredityandEvolution MendelianInheritance...

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