In squash plants, the allele for white fruit colour (WWW) is dominant over the allele for yellow fruit colour (www).
A grower crossed a homozygous white-fruited plant (genotype WWWWWW) with a homozygous yellow-fruited plant. All resulting F1F_1F1 offspring had white fruit.
State the genotype of the homozygous yellow-fruited parent plant.
Two of the F1F_1F1 offspring plants (both with genotype WwWwWw) are crossed. Complete the genetic diagram (Punnett square) below by determining the missing genotypes of the offspring.
Male gamete: WMale gamete: wFemale gamete: WWW(i)Female gamete: w(ii)(iii)\begin{array}{c|c|c} & \text{Male gamete: } W & \text{Male gamete: } w \\\hline \text{Female gamete: } W & WW & \text{(i)} \\\hline \text{Female gamete: } w & \text{(ii)} & \text{(iii)} \end{array}Female gamete: WFemale gamete: wMale gamete: WWW(ii)Male gamete: w(i)(iii)
Identify the genotypes for (i), (ii), and (iii).
State the expected ratio of white-fruited plants to yellow-fruited plants in the offspring of this cross in its simplest form.