The Testcross - TheTestcross o o

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The Testcross How can we determine the genotype of an individual that has the dominant phenotype? o The organism must have one dominant allele but could be homozygous dominant or heterozygous. The answer is to carry out a  testcross. o The mystery individual is bred with a homozygous recessive individual. o If any of the offspring display the recessive phenotype, the mystery parent must be heterozygous. The Law of Independent Assortment Mendel’s first experiments followed only a  single  character, such as flower color. o All the F progeny produced in these crosses were  monohybrids,  heterozygous for one character. o A cross between two heterozygotes is a  monohybrid cross. Mendel identified the second law of inheritance by following  two  characters at the same time. In one such  dihybrid cross,  Mendel studied the inheritance of seed color and seed shape. o
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This note was uploaded on 01/04/2012 for the course BSC BSC1005 taught by Professor Orlando,rebecca during the Fall '10 term at Broward College.

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The Testcross - TheTestcross o o

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