Types of Inheritance

Inheritance : Dominance

​There are three (3) types of dominance:

​

​Complete Dominance: dominant trait masks the recessive

Inheritance : Dominance

​There are three (3) types of dominance:

​

Codominance: both alleles equally show dominance for a trait

Inheritance : Dominance

​There are three (3) types of dominance:

​

Incomplete Dominance: both alleles equally show dominance for a trait

Multiple Choice

What type of dominance is shown in the picture?

• Complete dominance

• Incomplete dominance

• Codominance

Multiple Choice

This flower would be an example of which inheritance pattern?

• polygenic traits

• incomplete dominance

• multiple alleles

• codominance

Polygenic Trait

an inheritance pattern in which the trait is controlled by many (poly) genes

Ex. Skin color - many genes control it!

Multiple Alleles

3 or more forms of a gene (allele) for a specific trait

Ex. Blood Typing

Go watch video

Multiple Choice

A man with type O blood has children with a woman who is heterozygous for type A blood. What is the probability that their children will have type A blood?

• 0%

• 25%

• 50%

• 75%

Multiple Select

Suppose that a mother has blood Type A and genotype I^Ai and the father has blood Type B and genotype I^Bi. Draw a Punnett square to find the possible genotypes of their children.

What are the possible phenotypes of the kids? (select all that apply)

• Type A

• Type B

• Type AB

• Type O

Open Ended

(Add Punnett Square to scrap paper) In a paternity case, a single mother claimed that a certain man was the father of her baby. The man denied it, claiming that her current boyfriend was the father. The court ordered a blood test (much cheaper than DNA testing) to see if he could be ruled out as the father. The mother was Type O and the baby was Type O. The man was Type AB. Is it possible that he was the father? Why or why not?