Lecture 9/16 - E2 Flashcards
1
Q
Incomplete (partial) Dominance
A
Where heterozygote individuals show intermediate phenotypes between either homozygous state
Use designations like A1 or A2 instead of Aa
F1 theory shows similar results to blending theory
2
Q
Codominance
A
Heterozygotes are composite or additive (not intermediate) phenotypes with characteristic traits of both homozygotes
Example - ABO blood types
3
Q
How do you type blood
A
Antigens that are present cause clumping Examples: A = A antigen clumping AB = A and B clumping OO = no clumping
4
Q
What is an antigen?
A
Glycolipids with the lipid portion covalently fused to a protein in the red blood cell membrane
5
Q
Where is the H-antigen found?
A
On all ABO blood types (no extra sugar)
6
Q
How is the H-antigen modified for the A type?
A
Turns into N-acetlygalactosamine with an extra sugar
7
Q
How is the H-antigen modified for the B type?
A
Turns into Galactose
