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August 22, 2014

Homework Help: Genetics

Posted by Jenna on Wednesday, September 23, 2009 at 12:46pm.

Two traits (stem length and seed color) are simultaneously examined in a cross of two pure-breeding pea plant varieties. A tall green plant is crossed with a dwarf yellow plant, and the resulting F1 plants are self-crossed. A total of 640 F2 progeny are phenotypically characterized as follows:
tall yellow = 360
tall green = 120
dwarf yellow = 120
dwarf green = 40

What is the dominance relationship for plant height? for seed color?

What is this asking? Does dominance relationship refer to which allele/phenotype is dominant over the other (in which case, the tall phenotype is dominant over the dwarf phenotype, and yellow seed color is dominant over green seed color)?

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