Extended Mendel Principles

Question 1

Incomplete Dominance

Answer 1

Occurs when a phenotype of a heterozygote lies somewhere between the phenotype of either homozygote

I.e. Blended theory

Question 2

Multiple alleles

Answer 2

Many genes have more than 2 alleles

I.e. 3 alleles of I gene determine blood type

Question 3

Codominence

Answer 3

2 phenotypes expressed at once

Red and white NOT pink

I.e. AB blood

Question 4

Polygenetic Inheritance

Answer 4

Occurs when multiple genes influence a single trait/phenotype

I.e. Skin pigment

Question 5

Gene interaction

Answer 5

2 or more genes influence a single trait