Question

Humans can express blood types A, B, AB, or O. In order for a person to express blood type O, they must inherit the allele for O type blood from both parents. A person would express AB type blood if they inherited the A allele from one parent and the B allele from the other parent. Therefore, blood type in humans demonstrates
a
complete dominance
b
codominance
c
incomplete dominance
d
complete dominance and codominance
e
incomplete dominance and codominance

Answer 1

ill help again

Answer 2

give me a sec

Answer 3

yeah i learned this over a year ago have @snowflake0531 or @eiwoh2

Answer 4

@faithkristine can you guess

Answer 5

sure i have a pretty sure guess

Answer 6

ok the guess is?

Answer 7

@faithkristine

Answer 8

sorry i was talking

Answer 9

please just a guess

Answer 10

You need to know the definitions of the different types of inheritance

So read the definitions on here
https://ib.bioninja.com.au/standard-level/topic-3-genetics/34-inheritance/modes-of-inheritance.html

https://biologydictionary.net/incomplete-dominance/#:~:text=Incomplete%20dominance%20is%20when%20a,semi%2Ddominance%20or%20partial%20dominance.

Essentially,

Complete dominance means that a dominant allele will mask the effect of the recessive allele
So an example: let's say black hair (B) is dominant and blonde hair (b) is recessive

if you were heterozygous Bb then that dominant black hair allele would mask the recessive blonde hair allele. Your hair would be just black.

incomplete dominance is when the dominant allele doesn't completely mask the recessive allele so just using the same hair colors
if we had Bb, then instead of having black hair, you would have a hair color that's a mix of black and blonde so maybe something brown.

Finally, in codominance you would see the effects of both alleles.
I will continue to use the hair color examples. So if you had an allele for black hair and blonde hair- then it it was codominance, you would have hair that has both black and blonde hair.

So to clarify, incomplete dominance would be a mix of the two colors. While in codominance, you have both the original colors separately so imagine half the hair is black and half is blonde.

Answer 11

So after knowing all of that, take a look at blood type

"A person would express AB type blood if they inherited the A allele from one parent and the B allele from the other parent."

What type of inheritance is that? You're expressing both alleles

(Hint: if you click on the links I sent, they even talk about what type of inheritance blood types are)