Respuesta :
Since it's incomplete dominance we know that all the traits are of course dominant.
That in mind we know that anything heterozygous will have two different traits, making the cream colored mice have a punnet square somewhat like this:
     W    Y
W Â Â WW Â Â WY
Y Â Â WY Â Â YYÂ Â
Referring back to the yellow and white mice being homozygous (two of the same traits) we can gather from this punnet square the ratios for both.
WC = Cream colored = 50%
WW = White = 25%
YY = Yellow = 25%
That in mind we know that anything heterozygous will have two different traits, making the cream colored mice have a punnet square somewhat like this:
     W    Y
W Â Â WW Â Â WY
Y Â Â WY Â Â YYÂ Â
Referring back to the yellow and white mice being homozygous (two of the same traits) we can gather from this punnet square the ratios for both.
WC = Cream colored = 50%
WW = White = 25%
YY = Yellow = 25%
If two cream-colored mice mate, the phenotypic ratio we can expect of their offspring is 1:2:1.
What is the phenotypic ratio?
A phenotypic ratio is a numerical relationship between phenotypes that shows how often the number of one phenotype relates with the frequency of another.
It is given that coat color in mice shows incompletely dominant.
YY = yellow
WW= white
YW = cream
YW x  YW (parents)
The Punnett square will be
    Y    W
Y Â YY Â Â YW
W Â YW Â Â WW
1/4 = YY = 25%
1/4 = WW = White = 25%
1/2 = WC = Cream colored = 50%
Thus, the ratio is 1:2:1.
Learn more about phenotype, here:
https://brainly.com/question/20730322