In cattle, white coat colour (ww) and black coat colour(ww) when crossed produces roan coat colour(ww)=F1. In F2 genotypic and phenotypic ratio of 1:2:1 is obtained.****
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Yes, true because in case of codominance
Genotypic and phenotypic ratios are same for filial 2 generation that is 1:2:1 or in the case given can be understood through below mentioned cross
White color coat parent WW
Black color coat parent ww
WW×ww
Gametes haploid
Male W, W
Female w, w
F1 offspring all Ww since all roan hence allele is codominant
Now for f2- F1×F1
Ww×Ww
Gametes haploid
Male W, w
Female W, w
F2 offsprings
WW- 1 (white)
Ww- 2 (roan)
ww- 1 (black)
Genotypic and phenotypic ratios are same for filial 2 generation that is 1:2:1 or in the case given can be understood through below mentioned cross
White color coat parent WW
Black color coat parent ww
WW×ww
Gametes haploid
Male W, W
Female w, w
F1 offspring all Ww since all roan hence allele is codominant
Now for f2- F1×F1
Ww×Ww
Gametes haploid
Male W, w
Female W, w
F2 offsprings
WW- 1 (white)
Ww- 2 (roan)
ww- 1 (black)
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