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What is the expected ratio of progeny phenotypes

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Reference no: EM132158185

A purple flowering, smooth seed dihybrid plant (genotype PpSs) is test crossed with a white flowering, wrinkled seed plant (genotype ppss). These produce progeny in the following numbers of four phenotypes: 14:86:84:16 (purple flower + smooth seed coat: purple flower + wrinkled seed coat: white flower + smooth seed coat: white flower + wrinkled seed coat).

a) What is the expected ratio of progeny phenotypes assuming independent assortment of alleles?

b) Explain how the actual ratio of progeny (above) shows that the two genes are linked.

c) How many map units separate the colour and seed coat genes? Show calculations.

Reference no: EM132158185

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