Answer: e
Explanation:
I think it is e because if the father is normal than his X is healthy and so all his daughters who will get his X will be healthy as well because the illness is recessive. But the sons are going to take their mother X that is linked with this gene and they wont get their father’s X , which would have kept them normal.
Answer:
6,25%
Explanation:
Considering that the couple has a trait of sickle cell anemia, we know that both are heterozygous for the disease (Aa) and therefore can have children with the following genotypes:
Parents: Aa X Aa
Children: AA(A x A), Aa(A x a), Aa (a x A) and aa(a x a)
Knowing that sickle cell anemia only occurs in homozygous individuals, the probability for children to have the disease according to each crossing is:
A x A = 1/4 = 25%
A x a = 1/4 = 25%
a x A = 1/4 = 25%
a x a = 1/4 = 25%
The probability of forming each homozygous child (aa) is 1/4 or 25%. Since they are two children, the probability of both having sickle cell anemia is calculated by multiplying the probability of each, so:
1/4 × 1/4 = 1/16 = 0.0625 = 6.25%
It is concluded that the probability of a heterozygous couple for sickle cell anemia to have two children with the disease is 6.25%.
The theory that proposes that the universe emerged form an explosion (The Big Bang) is known as the Big Bang Theory.
Hope it helped,
BioTeacher101
As in a unusual life form? well we have to stop it because it would interrupt our air voltage<span />
