Question

1. black fur is dominant to white fur. use the letter \b\ as the allele for fur color. a female and male that are both heterozygous are crossed. create a punnett square to describe the possible genotypes and phenotypes of offspring. be sure to also calculate the genotypic ratio.

% bb ____% black fur ____
% bb ______
% bb ____ % white fur ____

1. what do you think is the most important thing to remember when solving punnett square problems?

Explanation:

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Question 14

Step1: Identify parent alleles

Both parents are heterozygous: $Bb$

Step2: Set up Punnett Square

	$B$	$b$
$b$	$Bb$	$bb$

Step3: Calculate genotype percentages

• $\% BB = \frac{1}{4} \times 100 = 25\%$
• $\% Bb = \frac{2}{4} \times 100 = 50\%$
• $\% bb = \frac{1}{4} \times 100 = 25\%$

Step4: Calculate phenotype percentages

Black fur ($BB, Bb$): $\frac{3}{4} \times 100 = 75\%$
White fur ($bb$): $\frac{1}{4} \times 100 = 25\%$

The key rule is correctly identifying the dominant and recessive alleles, and accurately mapping parent gametes to the Punnett square to ensure proper inheritance combinations are counted. This prevents errors in genotype and phenotype predictions.

Answer:

Punnett Square:

	$B$	$b$
$b$	$Bb$	$bb$

• $\% BB$: 25%
• $\% Bb$: 50%
• $\% bb$: 25%
• $\%$ black fur: 75%
• $\%$ white fur: 25%

Genotypic ratio: $1:2:1$ (BB:Bb:bb)

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Question 15