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kakasveta [241]
2 years ago
9

Which of the following is the best example of a possible future technology that could be used to eliminate sickle cell disease i

n humans?
A. a genetically engineered virus which can eliminate sickle-shaped cells in human blood
B. genetic screening which matches sickle cell carriers to people with AA genotypes
C. the ability to replace all S alleles in human red blood cells
D. the ability to replace all S alleles in fertilized eggs
Biology
1 answer:
Alex787 [66]2 years ago
6 0

Answer:

C. the ability to replace all S alleles in human red blood cells

Explanation:

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Answer: 60%

Explanation:

In population genetics, the Hardy-Weinberg Principle states that the genetic composition of a population remains in equilibrium as long as no natural selection or other factors are active and no mutations occur.

The frequencies of the genotypes of an individual locus will be set to a particular equilibrium value.<u> It also specifies that these equilibrium frequencies can be represented as a simple function of the allelic frequencies at that locus</u>. In the simplest case, with a locus with two alleles A and a, with allele frequencies of p and q respectively, the principle predicts that <u>the genotypic frequency for the dominant homozygous AA is p^2, that of the heterozygous Aa is 2pq and that of the recessive homozygous aa, is q^2. The allele frequency of a is represented as p and the frequency of recessive allele is q.</u>

The three genotypes AA : Aa : aa appear in a ratio p² : 2pq : q². If we add them up, we get the unit:

p^2 + 2pq + q^2 = (p + q)^2 = 1  

And p + q = 1

<u>Rh-positive genotypes are represented as AA (homozygous dominant) or Aa (heterozygous) since the presence of a single dominant allele is sufficient to express the phenotype. While Rh-negative genotypes are represented as aa. </u>

If 84% of the population is Rh-positive, that means that this percentage includes all those who are AA and Aa. Then 16% are aa.

F(aa)=q^2=0.16

then F(a)=q=0.4

And since p + q = 1, p + 0.4 = 1, then p is 0.6

We can also calculate the rest, then F(AA)=p^2= 0.36

So F(Aa)= 2pq = 2 x 0.6 x 0.4 = 0.48

Notice that 0.36 + 0.16 + 0.48 = 1

3 0
3 years ago
ME AJUDEM POR FAVOR Marque a alternativa que contém estrutura que NÃO possui ácidos nucléicos em sua composição: A) núcleo. B) r
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C the awnser is c I believe
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Answer:

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Explanation:

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