Question

Hello I need help making the pedigree chart and also the punnet squares we can make up this up Alleles C= curly hair c= straight hair

Answer 1

To answer this question first we need to set our parental relationships as follows:

Secondly, we set our characteristic of interest, in this case Curly/straight hair

Alleles

Dominant: C= Curly hair

Recessive: c= straight hair

Then we set our inheritance of traits, therefore it will be as follows

Now we can proceed to do our punnet squares

P: Cc x Cc

Apply for: Kate x Jayden and Fred x Brittney

$\begin{bmatrix}{\placeholder{⬚}} & {C} & {c} \\ {C} & {CC} & {Cc} \\ {c} & {Cc} & {cc}\end{bmatrix}$

Frequencies:

Genotypic: CC (1/4), Cc(2/4), cc(1/4)

Phenotypic: Curly hair (3) straight hair (1)

P: Cc x cc

Apply for: Jimmy x Ara

$\begin{bmatrix}{\placeholder{⬚}} & {C} & {c} \\ {c} & {Cc} & {cc} \\ {c} & {Cc} & {cc}\end{bmatrix}$

Frequencies:

Genotypic: Cc (2/4), cc(2/4)

Phenotypic: Curly hair (2) Straight hair (2)

P: Cc x CC

Apply for: Brooklyn x Timmy

$\begin{bmatrix}{\placeholder{⬚}} & {C} & {C} \\ {C} & {CC} & {CC} \\ {c} & {Cc} & {Cc}\end{bmatrix}$

Frequencies

Genotypic: CC (2/4), Cc (2/4)

Phenotypic: Curly hair (4/4)