AP BIOLOGY

HEREDITY

MONOHYBRID CROSS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In dogs, long hair (L) is dominant to short hair (l). What is the phenotype of a dog that is homozygous dominant for this trait?
A
Long hair
B
LL
C
Short Hair
D
Ll
Explanation: 

Detailed explanation-1: -The allele for short hair (L) is dominant to the allele for long hair (1). A cross of heterozygous two short-haired dogs produces six short-haired and two long-haired offspring.

Detailed explanation-2: -Short hair is due to a dominant gene (S) in rabbits and long hair is its recessive allele (s). A cross between a short-haired male and a long-haired male produced a litter of one long-haired and seven short-haired bunnies.

Detailed explanation-3: -What is a Homozygous Recessive Genotype? A homozygous recessive genotype, as mentioned above, has two recessive alleles. In genetics, this is designated with two of the same lower case letters such as aa. This shows the genes that were inherited from each parent were recessive.

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