Incomplete, Codominance, and Blood Type

Review of Simple Mendelian Genetics:

Law of Segregation:

Law of Independent Assortment:

Dominant vs. Recessive: the dominant allele masks the recessive one, so you see the

dominant trait when you have a homozygous dominant or heterozygous allele pair

What is the only way to see a recessive trait?

Dominant alleles are represented as…

Recessive alleles are represented as…

Incomplete Dominance:

Incomplete Dominance:

Draw the flower example in the space below:

What would the phenotype ratios be for the cross between two F₁ parents?

Incomplete dominant alleles are represented as…

When two different alleles come together in a heterozygous individual, what is the

phenotype?

Codominance:

Codominance:

What would the phenotype ratios be for the cross between two F₁ parents?

Draw the horse example in the space below:

Codominant alleles are represented as…

When two different alleles come together in a heterozygous individual, what is the phenotype?

Multiple Alleles and Blood Type:

Multiple Alleles:

Blood Type is governed by the following alleles:

How many alleles does each person have?

Dominance Rules for Blood Type:

1.

2.

3.

The blood type gene and alleles are represented as…

Blood type gene: ______ Type B allele: _______

Type A allele: ______ Type O allele: _______

What are all the possible allele combinations for the following blood types?

Type A:

Type B:

Type AB:

Type O: