In mice, black coat color (B) is dominant over brown (b) and…
In mice, black coat color (B) is dominant over brown (b) and a solid pattern (S) is dominant over white spotted (s). A spotted mouse with a black coat color is crossed with a homozygous brown, solid mouse. All the F1 mice are black and solid. A testcross is then carried out by mating the F1 mice with brown spotted mice. Using the five-step method on scratch paper, give the expected ratios of the progeny expected from the testcross. The predicted phenotypic ratio would be: [blank1] black solid: [blank2] black spotted: [blank3]brown solid: [blank4] brown spotted The predicted genotypic ratio would be: [blank5]BbSs:[blank6]Bbss:[blank7]bbSs:[blank8]bbss
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