BIOL 300 Chapter Notes - Chapter 12: Gregor Mendel, Homologous Chromosome, Genetic Recombination
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Incomplete dominance: occurs when the effects of recessive alleles can be detected to some extent in heterozygotes. Gregor mendel carried out crosses with seven different genes. Found that his observations from crosses were consistent with the hypothesis that each of the other genes assorted independently of all the others in the formation of gametes. Organisms have far more genes than chromosomes. Chromosomes contain many genes, each gene at a particular locus. When they are located in different parts of the chromosome they assort independently in gamete formation because the two behave independently of one another during meiosis. Genes located on the same chromosome may be inherited together in genetic crosses and are known as linked genes and the process is called linkage. Thomas h morgan used a fruit fly to investigate mendels principles in animals carried on the same chromosome. Groups of genes that tended to assort together in crosses were believed to be.