AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

THE GENETICS OF VIRUSES AND BACTERIA

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When a red and white individual produce pink offspring it is called:
A
codominance
B
multiple alleles
C
incomplete dominance
D
epistasis
Explanation: 

Detailed explanation-1: -Incomplete dominance results in heterozygotes with intermediate phenotypes, as in the case of snapdragons when parents with red flowers and white flowers are crossed resulting in heterozygous offspring with pink flowers.

Detailed explanation-2: -This pattern of inheritance is described as incomplete dominance, meaning that neither of the alleles is completely dominant over the other: both alleles can be seen at the same time. The allele for red flowers is incompletely dominant over the allele for white flowers. Red + white = pink.

Detailed explanation-3: -As mentioned earlier, incomplete dominance is a partial dominance, meaning the phenotype is in between the genotype dominant and recessive alleles. In the above example, the resulting offspring has a pink color trait despite the dominant red color and white color trait due to incomplete dominance.

Detailed explanation-4: -Incomplete dominance means that neither color shows dominance in the hybrid generation. This means that instead of solid red or solid white flowers, the heterozygous plants will display a mixture of both colors.

Detailed explanation-5: -Wavy fur in Labradoodles is an example of incomplete dominance. Another example of incomplete dominance in animals is coat color. One of the genes for horse coat color can occur in two colors, reddish or cream. If a horse is homozygous for either allele, that color is the phenotype.

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