Question

In: Biology

Two double heterozygous normal appearing corn plants for genes A (albino) and D (dwarf), where the...

Two double heterozygous normal appearing corn plants for genes A (albino) and D (dwarf), where the mutant phenotype is recessive for each gene, were crossed. What is the expected frequency of plants with a Green Dwarf phenotype in their offspring?

Solutions

Expert Solution

the genotype of the parents is AaDd and they are albino dwarf. since it is given that the mutant phenotype is recessive, green would have a genotype aa, and the dwarf would have a genotype of DD or Dd.

the punnet square for the progeny genotype would be as shown in the table below. the yellow highlighted ones are Albino dwarf (9/16), blue are albino tall (3/16) green are green dwarf (3/16) and the grey highlighted one is green tall (1/16). So, the expected frequency of green dwarf offsprings is 3/16 = 0.1875 or 18.75%

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aD

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AADD

AADd

AaDD

AaDd

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AADd

AAdd

AaDd

Aadd

aD

AaDD

AaDd

aaDD

aaDd

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AaDd

Aadd

aaDd

aadd

gladiator answered 2 years ago
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