| December 7, 2015

Suppose we have three linked genes, all of which control different aspects of the same phenotype (such as one controlling shape, another controlling color, and so forth). We perform a test cross of a triple heterozygous (a+ b+ c+/ a b c) with a triply homozygous recessive (a b c / a b c) and then count the number of progeny in each of the phenotypic classes. There are a total of 550 progeny. Arrange the genetypes in the table, define the Origin (parental, single cross-over progeny and double-crossover progeny) and determine the order of the genes on the chromosome. use the table to provide and organize your answers.

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Category: Biology

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