there is no dominant allele, there is no recessive allele. both alleles “blend” to result in a...

There is no dominant allele, There is no recessive allele.Both alleles “blend” to result in a third phenotype.

Traits that are Controlled by Three or More AllelesAn Individual Has a Combination of Two of These

Allele A and Allele B are Codominant over Allele O (recessive)

Blood Type Determined by the

Proteins on the Surface of Red Blood Cells

Type A Protein A

Type B Protein B

Type AB Proteins A & B

Type O No Proteins

Key

Red: Type A

Blue: Type B

Red/Blue: Type AB

White: Type O

What are the Genotypes of Each Individual?

Traits that are Controlled by GenesFound on the X Chromosome but

not the Y Chormosome

Sex Linked Recessive Traits In Human Beings

Red Green Colorblindness

Hemophilia

Multiple Gene (Polygenic) Inheritance

Gametes

 ABC 

 ABc 

 AbC 

 Abc 

 aBC 

 aBc 

 abC 

 abc 

ABC 6 5 5 4 5 4 4 3

ABc 5 4 4 3 4 3 3 2

AbC 5 4 4 3 4 3 3 2

Abc 4 3 3 2 3 2 2 1

aBC 5 4 4 3 4 3 3 2

aBc 4 3 3 2 3 2 2 1

abC 4 3 3 2 3 2 2 1

abc 3 2 2 1 2 1 1 0

Table 1. Polygenic inheritance in people showing a cross between two mulatto parents (AaBbCc x AaBbCc). The

offspring contain seven different shades of skin color based on the number of capital letters in each genotype.