Part 2: Dihybrid Cross—Predicting Flower Color and Seed Shape

Question

Imagine that you are crossing two plants that are heterozygous for flower color and seed shape. The dominant and recessive alleles for these traits are as follows:

purple flowers: P

white flowers: p

round seeds: R

wrinkled seeds: r

Determine the genotype of each parent plant and write them below.

 Genotype of parent plant 1:

Genotype of parent plant 2:

Answer 1

Hi Danielle!

So if you are crossing two heterozygous plants that would mean that each parent is big P, little p and big R little r. The alternative would be homozygous which would be big, big or little, little at each allele.

I hope this helps!