5.2 Variations

Question 1

Incomplete dominance

Answer 1

is a mixture of two traits

Question 2

Codominance

Answer 2

is the appearance of both traits

Question 3

Blood types

Answer 3

Human blood is both a codominant and dominant trait

Four blood types: A,B,AB,O

There are three possible alleles:
I^A, I^B, i

They each code for a protein on the surface of a blood cell.
If your blood already has this protein, you can accept blood that has it.
If you do not have this protein, you cannot accept blood with it

Question 4

Polygenic Inheritance

Answer 4

A polygenic trait is a trait that is controlled by more than one gene.

Ex: skin colour