Question

In: Biology

Black fur color is dominant to white fur color and non-webbed toes are dominant to webbed...

Black fur color is dominant to white fur color and non-webbed toes are dominant to webbed toes. a dog with white fur and web toes is mated with a dog homozygous dominant for both black fur and non-webbed toes. Draw the resulting Punnett square from this cross. What are the genotypic and phenotypic ratios of their offspring.

Solutions

Expert Solution

Black fur color - BB.

White fur color - bb.

Non-webbed toes - WW.

Webbed toes - ww.

Dog with white fur and web toes - bbww.

Dog homozygous dominant for both black fur and non-webbed toes - BBWW.

Parent generation - BBWW X bbww

Gametes formed BW bw

F1 generation BbWw(black fur and non-webbed toes) X BbWw

Gametes formed BW, Bw, bW and bw BW, Bw, bW and bw

F2 generation

Male/ Female BW Bw bW bw
BW BBWW(black fur and non-webbed toes) BBWw(black fur and non-webbed toes) BbWW(black fur and non-webbed toes) BbWw(black fur and non-webbed toes)
Bw BBWw(black fur and non-webbed toes) BBww(black fur and webbed toes) BbWw(black fur and non-webbed toes) Bbww(black fur and webbed toes)
bW BbWW(black fur and non-webbed toes) BbWw(black fur and non-webbed toes) bbWW(white fur and non-webbed toes) bbWw(white fur and non-webbed toes)
bw BbWw(black fur and non-webbed toes) Bbww(black fur and webbed toes) bbWw(white fur and non-webbed toes) bbww(whitefur and webbed toes)

The genotypic ratio - 1BBWW: 2BBWw: 2BbWW: 4BbWw: 1BBww: 2Bbww: 1bbWW: 2bbWw : 1bbww.

The phenotypic ratio - 9 black fur and non webbed toes : 3 black fur and webbed toes: 3 white fur and non-webbed toes: 1 whitefur and webbed toes.


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