Respuesta :
[insert colour?] = R
white = W
roan = RW
1) figure out the genotypes of the parents.
Since this a codominance problem, in order to be one colour or the other, an individual must be homo_zygous for that trait and in order to be a roan, an individual must be hetero_zygous so these will be the parent's genotypes:
male = [tex]WW[/tex]
female = [tex]RW[/tex]
2) produce a punnet square and solve
A cross between a homo_zygous parent and a hetero_zygous parent will produce a 2 by 1 punnet square. They can only produce two kinds of offspring and in this question, the possible results are either a white cattle or a roan cattle. Their offspring's genotypes and phenotypes are as follows:
genotypic ratios:
WW : WR
[1 : 1] or [0.50 : 0.50] or [50% : 50%]
phenotypic ratios:
white : roan
[1 : 1] or [0.50 : 0.50] or [50% : 50%]
Answer:
Gregor Mendel knew how to keep things simple. In Mendel's work on pea plants, each gene came in just two different versions, or alleles, and these alleles had a nice, clear-cut dominance relationship (with the dominant allele fully overriding the recessive allele to determine the plant's appearance
[tex]by \: the \: way \: your \: introduction[/tex]