please answer this question with an explanation Duroc Jersey

please answer this question with an explanation!

Duroc Jersey pigs are typically red, but a sandy variation is also seen. When two different varieties of true-breeding sandy pigs were crossed to each other, they produced F1 offspring that were red. When these F1 offspring were crossed to each other, they produced red, sandy, and white pigs in a 9:6:1 ratio. Explain this pattern of inheritance in terms of number of genes, and any allele or gene interactions.

Solution

The case discussed above involves a dihybrid cross.In this, the Mendelian ratio is given s 9:3:3:1.In this ratio the

3\'s usually represent offspring which are usually dominant for only one trait,This is given as :P_qq or ppQ_.

Now the ratio we have 9:6:1 helps to combines these. This means that if a very important and dominant allele is

missing for one of the given genes or the other gene here , then the given phenotype will be referred to as

sandy..Moreover there should be at least one dominant allele for each gene which results in red and there should

be atleast 4 recessive genes which result in the color white.