Question

People who are heterozygous for sickle cell anemia have the “sickle cell trait.” This is a much milder form of the disease. Looking at the image below, what can you infer about having the sickle cell trait and malaria?
A-Having the sickle cell trait in regions where malaria is common carries a higher fitness.
B- It is better to have the sickle cell trait in areas where malaria is uncommon.
C- The genotype for the sickle cell trait is manipulated by natural selection.
D- Having the sickle cell trait in regions where malaria is not prevalent carries a higher fitness.

Answer 1

i think A.
but i'm not sure

Answer 2

What do you think @alyssa.ward2016

Answer 3

A

Answer 4

i think you should try A

Answer 5

@King.Void.

Answer 6

http://microbewiki.kenyon.edu/index.php/Malaria_Resistance_and_Sickle_Cell_Trait

Answer 7

i think it's A...

Answer 8

@bingtamekia @SyedMohammed98 please avoid giving direct answers
http://openstudy.com/code-of-conduct This site has a policy for "Give Help, Not Answers" violations of such policies could potentially result in an account suspension or ban.

Answer 9

@alyssa.ward2016 Having only one copy of the gene that causes sickle cell anemia provides extremely effective resistance to malaria. It does have a fitness cost though, but this cost is not high enough to prevent carries from reproducing.