Multiple alleles

Question 1

What is multiple alleles

Answer 1

When there are more than 2 alleles for the same gene

Question 2

What is an example of multiple alleles

Answer 2

Fruitflies, they can have 4 different possible eye colours:

red, apricot, honey and white

Question 3

How do we find whats dominant in multiple alleles

Answer 3

There is a hierarchy when multiple alleles exist

ex: Red eyes dominate all eyes
Apricot eyes dominate honey and white
Honey eyes dominate white
White eyes is recessive

Question 4

The dominant allele in multuple alleles is represented as

Answer 4

Capital letters (ex: CC)

Question 5

The next dominant alleles are represented as

Answer 5

Capital letters with a superscript
(Ex: Cᵖᵒ Cᵖᵒ and Cᵒ Cᵒ)

Question 6

The recessive alleles are represented as

Answer 6

Lower case letter (ex: cc)

Question 7

Do multiple alleles exist in humans

Answer 7

Yes

Question 8

What is an example of multiple alleles in humans

Answer 8

Blood types

Question 9

How many different alleles make up our blood types

Answer 9

3

Question 10

What are the 3 different alleles that make up our blood types

Answer 10

1. I ᵃ
2. I ᵇ
3. i

Question 11

How many genotypes and phenotypes do the 3 different alleles make for our blood types

Answer 11

6 genotypes and 4 phenotypes

Question 12

What do the alleles in our blood types control

Answer 12

The production of antigens on red blood cells

Question 13

What is an antigen

Answer 13

A substance that makes the body produce anti-bodies against whatever substance has entered our body

Question 14

What are anti-bodies

Answer 14

Proteins that help the body fight off viruses and bacteria

Question 15

What antigen does allele Iᵃ produce

Answer 15

A

Question 16

What antigen does allele Iᵇ produce

Answer 16

B

Question 17

What antigen does allele i produce

Answer 17

No antigens

Question 18

What are the 6 genotypes of our blood and the 4 phenotypes

Answer 18

1. I ᵃ I ᵃ - Type A
2. I ᵃ i -Type A
3. I ᵇ I ᵇ -Type B
4. I ᵇ i -Type B
5. I ᵃ I ᵇ -Type AB
6. ii -Type O

Question 19

What blood types can type A blood recieve

Answer 19

A and O

Question 20

What blood types can type B blood recieve

Answer 20

B and O

Question 21

What blood types can type AB blood recieve

Answer 21

Every blood type

Question 22

What blood type can type O blood recieve

Answer 22

Only type O

Question 23

Why can certain blood types not give other blood types blood

Answer 23

Because those blood types have antibodies against them

Question 24

Why can type AB blood recieve blood from everyone but can not give blood to anyone

Answer 24

Because type A and type B have antibodies against each other (type AB has both A and B) and type O cant recieve from anyone

Question 25

Why can type O blood give blood to everyone

Answer 25

Because it produces no antigens, so it does not trigger an immune response from any blood types

Question 26

What blood type is an example of co-dominance

Answer 26

Type AB, both antigens are present on the cell

Question 27

A mother with type B blood gives birth to a child with type O blood and names a man with type O blood as the father. What is the genotype of the father and the child? what are the possible genotypes of the mother? Is the man a suspect? Why?

Answer 27

Genotype of father and child: ii
Genotype of mother: I ᵇI ᵇ or I ᵇi

The man is a suspect because 50% of the offspring can be type O