Question

What percentage of the offspring of two parents that are both heterozygous for the trait would you expect to have LONG fur?

a. 0%
b. 25%
c. 50%
d. 75%

Answer 1

When two heterozygous parents are crossed, 75% of the offspring are expected to have long fur, since both the homozygous dominant (LL) and heterozygous (Ll) genotypes display the long fur phenotype.

Step-by-step explanation:

The question you've asked is related to Punnett squares and genetic inheritance, specifically concerning the inheritance of a trait for fur length where the long fur (L) is the dominant allele and the short fur (l) is the recessive allele. When both parents are heterozygous (Ll), they each carry one allele for long fur and one for short fur.

Using a Punnett square, we can predict the genotypes of the offspring when crossing two heterozygous (Ll) parents:

• 25% (LL) will have homozygous dominant genotype with long fur.
• 50% (Ll) will have heterozygous genotype with long fur, since the dominant allele masks the recessive one.
• 25% (ll) will have homozygous recessive genotype with short fur.

To answer your question, when two heterozygous parents are crossed, you would expect 75% of the offspring to have long fur - this combines the 25% homozygous dominant (LL) and the 50% heterozygous (Ll).