U3W7D1

Multiple Choice

Which of the following would be an example of Incomplete Dominance?

Multiple Choice

Which of the following would be an example of Codominance?

​The A and B alleles exhibit Codominance.
The O allele is recessive to both A and B.

Multiple Choice

What percent of the phenotypes will be Type A blood?

Remember: The A and B alleles exhibit Codominance.
The O allele is recessive to both A and B.

• 0%

• 25%

• 50%

• 75%

Complex Inheritance in Labradors

Look at the Punnett Square on the next slide - what seems to be the pattern for inheriting coat color?

Complex Inheritance in Labradors

There are two genes that control coat color. The "B" gene has a dominant allele (B) that codes for black fur. The recessive "b" codes for brown fur.

The second "E" gene can turn the first gene off, but only if the genotype is homozygous recessive (ee). This results in a yellow fur color.

Open Ended

Height is a trait controlled by several genes. Looking at the Punnett square and graph to the right, what do you notice about the distribution of the trait?

(Are most people likely to be tall, short. or in the middle?)

Open Ended

Pick one type of complex inheritance (incomplete dominance, codominance, polygenetic, environmental influence)

and describe it using an example.