Genotypes and Phenotypes in Incomplete Dominance

The video tutorial explains incomplete dominance using a Punnett Square. It describes how alleles blend in incomplete dominance, using fur color as an example. The tutorial compares complete and incomplete dominance, showing how heterozygous individuals exhibit a blend of traits. A Punnett Square is set up with heterozygous parents, and the resulting genotypes and phenotypes are analyzed, demonstrating the distribution of traits such as black, gray, and white fur.

What is a key feature of incomplete dominance?

• Neither allele is expressed.

• There is a blending of traits from both alleles.

• Both alleles are expressed equally.

• One allele is completely dominant over the other.

In the example of fur color, what does the Big B allele represent?

• White fur

• Gray fur

• Black fur

• No fur

What would be the phenotype of an organism with a Big B little b genotype in complete dominance?

• White

• Spotted

• Gray

• Black

How do you set up a Punnett square for two heterozygous individuals?

• Place both parents' alleles on the side.

• Place one parent's alleles in the center.

• Place both parents' alleles on the top.

• Place one parent's alleles on the top and the other's on the side.

In the context of the video, what does heterozygous mean?

• Having two identical alleles

• Having two different alleles

• Having no alleles

• Having three alleles

What is the probability of obtaining a Big B Big B genotype from two heterozygous parents?

• 1/8

• 3/4

• 1/2

• 1/4

What phenotype results from a Big B Big B genotype in incomplete dominance?

• White

• Spotted

• Gray

• Black

What is the phenotype of a little B little B genotype in the given example?

• Spotted

• Gray

• Black

• White

What is the phenotype ratio for the offspring of two heterozygous parents in this example?

• 1:2:1

• 3:1

• 2:1:1

• 1:1

What is the probability of obtaining a gray phenotype from two heterozygous parents?

• 1/8

• 3/4

• 1/2

• 1/4