In a mythical beast Godzailla bigfootus, coat color is under the control of a si

Question

In a mythical beast Godzailla bigfootus, coat color is under the control of a single gene, C, with two codominant alleles, C^B and C^Y. Heterozygotes are green while homozygotes are either blue (C^B C^B) or yellow (C^Y C^Y). An independently assorting gene I, segregates two alleles: I (color) is completely dominant to i (color inhibition. Two individuals that are both C^B C^Y Ii mate. What are the genotypic and phenotypic ratios expected in their offspring? Please give an explanation. Would like to understand concept to study.

Explanation / Answer

hi

Geotype means what genes are present: Rr is different from RR, which is different from rr. There are 3 cases. So in a case of Rr Rr rr rr the ratio would be 2:2=1:1. In a case of RR Rr Rr rr the ratio will be 1:2:1, because there are 3 present genotypes.
Phenotype means what genes are expressed. As you know, dominant alleles express over recessive ones, so you will only have 2 possibilities: dominant(RR or Rr) and recessive(rr). In a situation like Rr Rr rr rr the ratio is 1 dominant for every one recessive(1:1). The phenotypical ratio is the same for, let's say RR Rr rr rr(1:1) since in Rr the dominant allele expresses

However, remember, in a monohibridation cross you get 1:2:1 genotype and 3:1 phenotype., according to Mendel. The other ones are made up...
monohybrid cross, dihybrid cross, P generation, F1 generation and F2 generation.
Monohybrid cross This is a cross involving a single pair of contrasting traits (monohybrid)

P (parental) PP X pp (crossing truebreeding parents)
F1 Genotype: Pp
Phenotype: purple
F2

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