Evidence from Biochemistry and Mutation

Evidence from Biochemistry and Mutation - Mitosis and...

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Mitosis and Meiosis Result of meiosis is that the chromosomes randomly segregate. i.e. Any member of a pair has equal probability to occur in a gamete with any member of any other pair. Sexual recombination during gametogenesis Increases variability
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8. Gene locus Generally a specified location for a given gene on a given chromosome. From work by Thomas Hunt Morgan on Drosophila 9 . Gene linkage = Genes located on the same chromosome. They do not sort independently (see previous lecture for example 10 . Sex-linked traits = those carried on the sex-determining chromo- somes. Can sometimes be expressed in only one sex T t R r
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11. Crossing over Sister chromosomes can ex- change whole sections of chromosomes during meiosis. Leads to genetic recom- bination. Increases variability T t r R T t r R 1. Concept of multiple alleles One type of blood groups has 3 alleles, which gives rise to 6 possible genotypes T, t are two separate alleles A A A B A O B B B O O O
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13. Pleiotropy = multiple effects of a single gene
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Evidence from Biochemistry and Mutation - Mitosis and...

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