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?
a. 0%
b. 25%
c. 50%
d. 75%
e. 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?
a. 4 mice with black fur
b. 8 mice with black fur, 1 mouse with white fur
c. 5 mice with black fur, 6 mice with white fur
d. 6 mice with black fur, 2 mice with white fur

Question

01-12-2022
Biology

Answered

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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?
a. 0%
b. 25%
c. 50%
d. 75%
e. 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?
a. 4 mice with black fur
b. 8 mice with black fur, 1 mouse with white fur
c. 5 mice with black fur, 6 mice with white fur
d. 6 mice with black fur, 2 mice with white fur

Sagot :

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AnkitMidn AnkitMidn · Answer 1 · 2022-12-06T01:20:03-05:00

d. 75% will have the same phenotype as the parents.

Result(s) for the offspring would confirm that the mouse with black fur was heterozygous

b.8 mice with black fur, 1 mouse with white fur

c.5 mice with black fur, 6 mice with white fur

d. 6 mice with black fur, 2 mice with white fur

The expected genotype ratio when two heterozygotes are crossed is 1 (homozygous dominant) : 2 (heterozygous) : 1 (homozygous recessive). Then a phenotypic ratio of 2 : 1 is observed, there are chances of lethal allele.

To calculate percentage of offspring you need the total number of predicted offspring. And divide the (number of appeared phenotype) by (the total number of offspring). Multiply the number by 100 to get your percentage.

To learn more about phenotype , here

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