Incomplete dominance in palomino horse coat color inheritance

[Madara Uchiha]

Homework Statement

Hey guys...

The palomino horse results from the combination of two incompletely dominant genes, one codes for the colour chestnut and the other for cream. Determine the expected genotypic and phenotypic ratios for the following crosses:

a.)chestnut and cream
b.)palomino and cream
c.) palomino and palominoPlease this is the only question I didn't understand for my homework.. However I got 100% for phenotype for all options... Please correct me if I'm wrong and tell me what I'm doing right and wrong but mostly wrong :)

Homework Equations

What :S :?

The Attempt at a Solution

Let P^P represent the allele for palomino.
Let P^C1 represent the allele for cream.
Let P^C2 represent the allele for chestnut.a.)

_____P^C1______P^C1
P^C2__P^C1P^C2___P^C1P^C2
P^C2__P^C1P^C2___P^C1P^C2Genotype: 50% Cream; 50% Chestnut
Phenotype: 100% P^C1P^C2b.)____P^C1____P^C1
P^P__P^PP^C1__P^PP^C1
P^P__P^PP^C1__P^PP^C1Genotype: 50% Cream; Palomino 50%
Phenotype: 100% P^PP^C1

c.)____P^P____P^P
P^P__P^PP^P__P^PP^P
P^P__P^PP^P__P^PP^PGenotype: 100% Palomino
Phenotype: 100% P^PP^P

 

[Ygggdrasil]

A few points:

1) When the question asks about about genotype ratios, it's talking about the different combinations of alleles. For example, 50% P^C1P^C2, 50% P^C1P^C1 is a genotype ratio. A phenotype ratio would describe the numbers of horses of each color, for example, 50% palomino, 50% cream.

2) P^p is not the allele for palomino. In fact, phenotypes are not represented by a single allele. Rather, phenotypes are associated with pairs of alleles (e.g. P^C1P^C1 gives the cream phenotype, whereas P^c2P^c2 gives the chesnut phenotype). Read the question again, focusing on the first two sentences. What is the genotype associated with the palomino phenotype? If you still don't understand, you may need to re-read the section in your textbook on incomplete dominance.