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Question 6. In corn, a color in the aleurone (part of the seed) arises from the dominant allele A. The recessive allele, a, produces aleurones with no color. Leaf color is controlled by a second, linked gene, L. The recessive allele, l, causes plants to become yellow, whereas the dominant L allele confers a green leaf color. When I test-crossed a plant with an unknown genotype to a true-breeding plant that had colorless aleurones and yellow leaves, I obtained the following progeny: Colored, yellow: 12 Colored, green: 88 Colorless, yellow: 92 Colorless, green: 8 a. Indicate which offspring are Recombinants and which are Parentals. b. Calculate the recombination frequency between the A and L genes. Show your working. c. Draw the genotype of the unknown parent and indicate if it was trans- or cis.

          Question 6. In corn, a color in the aleurone (part of the seed) arises from the dominant allele A. The recessive allele, a, produces aleurones with no color. Leaf color is controlled by a second, linked gene, L. The recessive allele, l, causes plants to become yellow, whereas the dominant L allele confers a green leaf color. When I test-crossed a plant with an unknown genotype to a true-breeding plant that had colorless aleurones and yellow leaves, I obtained the following progeny:

Colored, yellow: 12
Colored, green: 88
Colorless, yellow: 92
Colorless, green: 8

a. Indicate which offspring are Recombinants and which are Parentals.
b. Calculate the recombination frequency between the A and L genes. Show your working.
c. Draw the genotype of the unknown parent and indicate if it was trans- or cis.

Added by Melissa R.

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