Wheat kernel color is an additive trait controlled by two genes, gene A and gene B. The A1 and B1 alleles add 1 unit of color to the kernels. The A2 and B2 alleles add 0 units of color to the kernels.   Question 1: If you crossed a dihybrid (A1A2 B1B2) individual to a A2A2 B2B2 individual, which of the following phenotypes are possible? a. 0 units (white) b. 1 unit (light pink) c. 2 units (dark pink) d. 3 units (light red) e. 4 units (dark red)   Question 2: If you crossed a dihybrid (A1A2 B1B2) individual to a A2A2 B2B2 individual, what is your expected phenotypic ratio? a. 1:2:1 b. 1:1:1:1 c. 9:3:3:1 d. 3:1

Two gene loci, A and B, are on separate chromosomes and alleles A and B are dominant over alleles a and b.    A codes for long branches, a codes for short branches.  B codes for green leaves and b codes for blue leaves.  A branch diagram or a punnett square would be useful for you to work this problem. What percentage of the progeny will have short branches and blue leaves from a cross AaBb × Aabb?  Group of answer choices 1/8 1/4 1/2 3/4

You have an autotetraploid plant with genotype AAaa that undergoes self-fertilization. At least two copies of the dominant allele A are needed to obtain the dominant phenotype. At what frequency will progeny with the dominant phenotype appear? Type your answer as a fraction, with no spaces (e.g., 1/16).

A homozygous fly with two recessive mutations causing purple body and short wings (ppss) is mated with a fly heterozygous for both mutations (p+p and s+s): "+" represents the wild-type allele. They have the following offspring:   26   Wild type (normal body, normal wings) 345   Purple body, normal wings 376   Normal body, short wings   13   Purple body, short wings What is the allele arrangement (haplotype) for the heterozygous parental fly? ("p" designates the mutant allele; "p+" designates the wild-type allele.)