Question

from number 1 on your sheet: blond hair (b) is dominant to red hair (b). mom is a * homozygous blond and dad has red hair.
what is the genotypic ratio of bb : bb : bb ?
choose

from number 1 on your sheet: blond hair (b) is dominant to red hair (b). mom is a * homozygous blond and dad has red hair.
what is the phenotypic ratio of blond to red hair ?
choose

from number 1 on your sheet: blond hair (b) is dominant to red hair (b). mom is a homozygous blond and dad has red hair.
what are the chances of a red-headed child?
choose

Explanation:

Step1: Identify parental genotypes

Mom (homozygous blond): $BB$; Dad (red hair): $bb$

Step2: Set up Punnett square

$$\begin{array}{c|cc} & B & B \\ \hline b & Bb & Bb \\ b & Bb & Bb \\ \end{array}$$

Step3: Calculate genotypic ratio

All offspring are $Bb$, so ratio $BB:Bb:bb = 0:4:0$ (simplified to $0:1:0$)

Step4: Calculate phenotypic ratio

All $Bb$ have blond hair, so blond:red = $4:0$ (simplified to $1:0$)

Step5: Find red-headed child chance

No $bb$ offspring, so chance = $\frac{0}{4} = 0\%$

Answer:

1. Genotypic ratio (BB : Bb : bb): 0 : 1 : 0
2. Phenotypic ratio (blond to red hair): 1 : 0
3. Chances of a red-headed child: 0%