Question

1. the female dog is heterozygous. the male dog is heterozygous. figure out the phenotypes and genotypes of their possible puppies by using a punnett square.\\% of possible genotypes:\

ff: \underline{\hspace{1cm}}\
ff: \underline{\hspace{1cm}}\
ff: \underline{\hspace{1cm}}\
\\% of possible phenotypes:\
black fur: \underline{\hspace{1cm}}\
grey fur: \underline{\hspace{1cm}}

Explanation:

Step1: Determine Parental Genotypes

Both parents are heterozygous, so their genotypes are \( Ff \) (female) and \( Ff \) (male).

Step2: Create Punnett Square

	F	f
f	Ff	ff

Step3: Calculate Genotype Percentages

• \( FF \): 1 out of 4 squares, so \( \frac{1}{4} \times 100 = 25\% \)
• \( Ff \): 2 out of 4 squares, so \( \frac{2}{4} \times 100 = 50\% \)
• \( ff \): 1 out of 4 squares, so \( \frac{1}{4} \times 100 = 25\% \)

Step4: Determine Phenotypes (Assume F is dominant for black, f for grey)

• Black fur: \( FF \) and \( Ff \) genotypes. Total: \( 25\% + 50\% = 75\% \)
• Grey fur: \( ff \) genotype, so \( 25\% \)

Answer:

• \( FF \): \( 25\% \)
• \( Ff \): \( 50\% \)
• \( ff \): \( 25\% \)
• Black fur: \( 75\% \)
• Grey fur: \( 25\% \)