Non-Mendelian Genetics

Question 1

When examining one trait, we perform what type of cross?

Answer 1

A monohybrid cross

Question 2

What is the phenotypic ratio of single trait inheritance?

Answer 2

3:1

Question 3

What is the Co-dominance pattern of inheritance?

Answer 3

Results in 3 different genotypes/phenotypes. None of which are dominant. Third phenotype is a mix.

Question 4

What is the incomplete dominance pattern of inheritance?

Answer 4

Results in 3 different genotypes/phenotypes. None of which are dominant. Third phenotype is a blend.

Question 5

What does the phenotype for incomplete dominance show?

Answer 5

A blended expression of both alleles

Question 6

What the phenotype for co-dominance show?

Answer 6

Both alleles are expressed in the phenotype.

Question 7

What are examples of co-dominance?

Answer 7

Roan cows, ABO blood types

Question 8

What is an example of incomplete dominance?

Answer 8

Snapdragons

Question 9

What are the four major blood types?

Answer 9

A, B, AB, O

Question 10

How many possible alleles does each gene have?

Answer 10

3 possible alleles (IA, IB, i)

Question 11

What does each allele code for?

Answer 11

A different enzyme

Question 12

What does the enzyme do?

Answer 12

Places different sugars on the surface of the red blood cell.

Question 13

What happens in IAIA (type A) blood?

Answer 13

Enzyme places one type of sugar on the surface

Question 14

What happens in IBIB (type B) blood?

Answer 14

Another enzyme places a different sugar on the cell

Question 15

What happens in IAIB (type AB) blood?

Answer 15

Both sugars are placed on the cell – CO-DOMINANCE

Question 16

What happens in ii (type O) blood?

Answer 16

Lacks the sugars of A,B,AB

Question 17

What are the dominant blood types?

Answer 17

IAi (type A): DOMINANT
IBi (type B): DOMINANT

Question 18

What are blood types only compatible with?

Answer 18

Blood types are compatible only with certain other types.

Question 19

What is each blood type compatible with?

Answer 19

• Type A produces an immune attack against type B & AB
• Type B produces an immune attack against type A and AB
• Type O will not produce an immune attack (universal donor)
• Type AB is known as the universal recipient (can receive from any type)

Question 20

What happens if you are infused with incompatible blood?

Answer 20

Agglutination occurs.

Question 21

What happens during agglutination?

Answer 21

The antigens in your blood bind to the antibodies of the donor blood and cause the blood to clump