In corn, a colored aleurone is due to the presence of an R allele; r/r is colorless. Another gene controls the color of the plant, with g/g being yellow and G_being green. A plant of unknown genotype is test-crossed, and the following progeny plants were obtained. Colored green 89 Colored yellow 13 Colorless green 9 Colorless yellow 92 What was the phenotype and genotype of the plant used for the test cross?   A. Colorless green - rG/rg   B. Colorless yellow - rg/rg   C. Colored yellow - Rg/rg   D. Colored green - RG/rg

Concepts of Biology
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ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:Samantha Fowler, Rebecca Roush, James Wise
Chapter8: Patterns Of Inheritance
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In corn, a colored aleurone is due to the presence of an R allele; r/r is colorless. Another gene controls the color of the plant, with g/g being yellow and G_being green. A plant of unknown genotype is test-crossed, and the following progeny plants were obtained.

Colored green 89

Colored yellow 13

Colorless green 9

Colorless yellow 92

What was the phenotype and genotype of the plant used for the test cross?

  A.

Colorless green - rG/rg

  B.

Colorless yellow - rg/rg

  C.

Colored yellow - Rg/rg

  D.

Colored green - RG/rg

Expert Solution
Step 1

The aleurone grain is the protein body which is a specialized dry vacuole where storage proteins accumulate in a stable form in seeds, usually in the endosperm. 

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