Question

in the cross bb x bb (two heterozygous mice), what percentage of the offspring would you predict to have the same phenotype as the parents?
0%
25%
50%
75%
100%

next, you perform a cross with a mouse with black fur and a mouse with white fur. which result(s) for the offspring would confirm that the mouse with black fur was heterozygous?
4 mice with black fur
8 mice with black fur, 1 mouse with white fur
5 mice with black fur, 6 mice with white fur
6 mice with black fur, 2 mice with white fur

Explanation:

Analyze the first cross

Using the Monohybrid Cross and Punnett Square knowledge points

$$
LATEXBLOCK0
$$

Analyze the second test cross

Using the Monohybrid Cross knowledge point

$$
LATEXBLOCK1
$$

Evaluate the second cross options

Using the Monohybrid Cross knowledge point

$$
LATEXBLOCK2
$$

Answer:

Question 1

In the cross Bb x Bb (two heterozygous mice), what percentage of the offspring would you predict to have the same phenotype as the parents?

• 0%
• 25%
• 50%
• 75% (Correct answer)
• 100%

Question 2

Next, you perform a cross with a mouse with black fur and a mouse with white fur. Which result(s) for the offspring would confirm that the mouse with black fur was heterozygous?

• 4 mice with black fur
• 8 mice with black fur, 1 mouse with white fur (Correct answer)
• 5 mice with black fur, 6 mice with white fur (Correct answer)
• 6 mice with black fur, 2 mice with white fur (Correct answer)