2023 · Paper 2 · Question 4 · 7 marks
SaveName the type of interaction between the two genes affecting fur colour.
What phenotype would a cat with the following genotype have?
XGXBff
Complete the genetic diagram to show all the possible genotypes and the ratio of phenotypes expected in the offspring of this cross.
Phenotypes of parents XGXGFf x XBYff
Genotypes of offspring
Phenotypes of offspring
Ratio of offspring phenotypes
In a population, 36% of cats had the F allele and had white fur.
Use the Hardy–Weinberg equation to calculate the frequency of the f allele in this population.
Show your working.
Answer ______________