If short hair (L) is dominant to long hair (l), then to determine the genotype of a short-haired animal it should be crossed with
A)LL.
B)Ll.
C)ll.
D)all of these.
E)none of these.

Question

Quizplus · Accepted Answer

To determine the genotype of a short-haired animal, it should be crossed with a long-haired animal that is homozygous recessive for long hair (ll). This is because if the short-haired animal is heterozygous (Ll), the long-haired animal will contribute the recessive allele and show up in the offspring, allowing us to determine the genotype of the short-haired animal. Crossing with an LL individual would not help us determine if the short-haired animal is homozygous dominant or heterozygous, and crossing with another Ll individual would not provide definitive information.

If Short Hair (L) Is Dominant to Long Hair (L)