Problem:
In Japanese morning glory, Hagiwara reported that purple flower color might be caused by dominant alleles at either one of two separate gene pairs. When dominant alleles are present at both gene loci, the flower color is blue, and when homozygous recessive for both gene loci, the color is scarlet. Two true-breeding purple flower plants were crossed in the parental generation to produce a blue flower F1 generation.
Required:
Question 1: What are the genotypes of the two true-breeding purple plants?
Question 2: What phenotypes with corresponding ratios would you expect in the F2 generation?
Question 3: What phenotypes with corresponding ratios would you expect in the testcross offspring, if you testcrossed the F1 generation?
Question 4: What phenotypes with corresponding ratios would you expect in the offspring if you crossed the F1 generation back to either of its parents?
Question 5: For the following cross, give the genotypes of the parents. You crossed a purple parent to a scarlet parent and got 1?2 purple and 1?2 scarlet in the offspring.
Question 6: For the following cross, give the genotypes of the parents. You crossed a blue parent to a purple parent and got 3/8 blue, 1?2 purple and 1/8 scarlet in the offspring.
Please read all the questions carefully and answer them.