"Balanced polymorphism" is demonstrated by the frequency of the trait for sickle cell anemia in various groups.
Why sickle cell anemia is called a Balanced polymorphism?
When individuals who possess two sets of the normal form gene have no benefit over heterozygous individuals, an illness might continue to be widespread. Balanced polymorphism would be at play when carriers have benefits that enable a harmful allele to survive in a community. This kind of polymorphism frequently involves heterozygosity for a hereditary disease that confers resistance to an infectious disease.
Sickle Cell Disorder
Anemia, joint discomfort, a huge spleen, and frequent, serious infections are all symptoms of the autosomal recessive illness sickle cell disease. Because carriers are immune to malaria, a parasitic ailment caused by Plasmodium falciparum that induces periods of cold and temperature, it serves as an example of balanced polymorphism.
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Answer:
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Explanation:
Answer:
FRFR
Explanation:
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Answer:
<h2>d. BbSs</h2>
Explanation:
As given;
Black coat color (B) is dominant on brown coat color (b);
Striped fur pattern (S) is dominant on a marbled fur pattern (s);
Cross of black, striped cat with brown marbled cat.
As given, brown and marbled is recessive, so brown marbled cat is bbss.
And according to the given offspring, the other parent must be heterozygous.
So black, striped cat is BbSs
cross is between BbSs and bbss
gametes are: parent-1: BS, Bs, bS, bb; Parent-2; bs
offspring is BbSs, Bbss, bbSs, bbss.