Answer:
Q1 : The possible genotypes for each of the four phenotypes. Even though only four different phenotypes are possible from this cross, nine different genotypes are possible, as shown in Figure 13.
Explanation:
Q2 : The resulting phenotype will be 25% RrYY, 50% RrYy, 25%Rryy. The proportion will be 1:2:1
To compute for the proportion of the offspring, we must compute it by the crisscross method/ punnett square:
RY Ry
rY RrYY RrYy
ry RrYy Rryy
The result will be:
25% RrYY, 50% RrYy, 25%Rryy
With this we can derive the ratio: 1:2:1
Explanations for the methods used.
Phenotypes are physical characteristics. When ratios are used to describe phenotypes it's called a phenotypic ratio. Phenotypic ratio is the number of one phenotype compared to another phenotype.
Punnett Square - The diagram is used by biologists to determine the probability of an offspring having a particular genotype. The Punnett square is a tabular summary of possible combinations of maternal alleles with paternal alleles
just copied this somewhere
