Problem 5.10
Colored aleurone in the kernels of corn is due to the dominant allele R. The recessive allele r, when homozygous, produces colorless aleurone.
The plant color (not the kernel color) is controlled by another gene with two alleles, Y and y. The dominant Y allele results in green color, whereas the homozygous presence of the recessive y allele causes the plant to appear yellow.
In a testcross between a plant of unknown genotype and phenotype and a plant that is homozygous recessive for both traits, the following progeny were obtained.
Colored, green11
Colored, yellow94
Colorless, green86
Colorless, yellow9
Part A
Based on the data, what can you say about the genotype of the unknown plant?
Based on the data, what can you say about the genotype of the unknown plant?
It was heterozygous for both genes.
It was heterozygous for one gene, and homozygous for the other.
It was homozygous for both genes.
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Part B
What is the phenotype of the unknown plant?
What is the phenotype of the unknown plant?
colored, yellow
colorless, green
colored, green
colorless, yellow
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