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Title: Incomplete Penetrence, Variable Expressivity, and Epistasis Post by: rjbrivera on Mar 6, 2015 Hi, I need help on how to do this problem.
Blue flower color is produced in a species of morning glories when dominant alleles are present at two gene loci, A and B. Purple flowers result when a dominant allele is present at only one of the two gene loci, A or B. Flowers are red when the plant is homozygous recessive for each gene (i.e., aabb). Two pure-breeding purple strains are crossed, and all the F1 plants have blue flowers. What are the genotypes of the parental plants? If two F1 plants are crossed, what are the expected phenotypes of the F2? If two F1 plants are crossed, what are the expected phenotype distribution in the F2? If an F1 plant is backcrossed to one of the pure-breeding parental plants, what is the expected ratio of phenotypes among progeny? Title: Re: Incomplete Penetrence, Variable Expressivity, and Epistasis Post by: rsb on Mar 6, 2015 Quote Two pure-breeding purple strains are crossed, and all the F1 plants have blue flowers. What are the genotypes of the parental plants? AAbb X aaBB Title: Re: Incomplete Penetrence, Variable Expressivity, and Epistasis Post by: wizarddim on Mar 6, 2015 Content hidden
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