AP BIOLOGY

HEREDITY

MONOHYBRID CROSS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The mom is homozygous dominant for no freckles. Which of the following represents her genotype? (select all that apply)
A
Ff
B
FF
C
ff
Explanation: 

Detailed explanation-1: -A person could be homozygous for the dominant trait. Homozygous means that they have two alleles that are the same. In this case, their genotype would be represented by two uppercase Fs. A person with this genotype would also have freckles.

Detailed explanation-2: -F (dominant) = Has Freckles. f (recessive) = No freckles.

Detailed explanation-3: -Your Alpha-1 genotype is FF. This means that you have two copies of the F mutation in your Alpha-1 genes. This is a rare form of alpha-1 antitrypsin deficiency.

Detailed explanation-4: -An organism with two dominant alleles for a trait is said to have a homozygous dominant genotype. Using the eye color example, this genotype is written BB. An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype. In our example, this genotype is written Bb.

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