Select all the factors that you know from the material presented in this lesson that are true of sickle cell anemia

A, B, D, E, G

It is an example of a single-gene disorder.

It occurs in both males and females.

It is passed down from both parents.

It involves the red blood cells.

It is sometimes treated with blood transfusions.

a, b, d, f, g

it is an ex. of single-gene disorder

it occurs in both males and females

it is passed down from both parents

it involves the red blood cells

it is sometimes treated with blood transfusions

Explanation: right on edg

1) gene flow

- it is described as the transfer of genes from one population to another population so that frequency of gene is increased.

-a zebra migrates to join a different herd of zebras.

2) natural selection

- a mechanism of evolutionary change in which individuals with advantageous traits survive and reproduce whereas the others ( those that can not adapt) eliminate from the population.

-competition for sunlight leads to taller trees.

3) mutation

- permanent change in the nucleotide sequence of dna ( genetic material) that could have harmful or useful consequences.

-the dna of a snake changes to make its venom stronger.

4) genetic drift - it is a random phenomenon ( that occurs by chance such as fire) that results in change in the gene frequency in a small population.    

-a grassfire randomly sweeps through a population of buffalo and kills most of the animals.

explanation:

if you listed your answers right then i believe your answer is b.