Two peanut cultivars are crossed and their f1 progeny are selfed to obtain an F2 generation....

Question 1

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Two peanut cultivars are crossed and their f1 progeny are selfed to obtain an F2 generation. The first variety (represented in well B) has a hairy stem. The second variety (represented in well C) has a glabrous (hairless) stem. This trait is controlled by a single gene, and hairy stems are completely dominant over hairless stems. The DNA from both parents and the progeny is isolated, and a portion of the gene controlling this trait is amplified using PCR and then digested with EcoR1 to reveal a restriction length polymorphism. The DNA is then run on the gel shown below. Well A is a DNA ladder. Well B is the hairy parent, well C is the hairless parent, and well D is one of the F2 progeny. What is the phenotype of the F2 plant whose genotype is shown in well D? в со

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Answer #1

Genotype of F2 = Hh & phenotype = hairy stem

H = hairy stem

h = hairless stem

Gel shows that F2 is heterozygous so it has hairy stem .

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2. A dominant allele H reduces the number of body bristles that Drosophila flies have, giving...

Two peanut cultivars are crossed and their f1 progeny are selfed to obtain an F2 generation....

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2. A dominant allele H reduces the number of body bristles that Drosophila flies have, giving...

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Two peanut cultivars are crossed and their f1 progeny are selfed to obtain an F2 generation....