Hb A and Hb S alleles of normal and sickle cell haemoglobin areA- polygenic allelesB- cumulative allelesC- codominant allelesD- multiple alleles

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Standard XII

Biology

What is Pleiotropy?

Hb A and Hb S...

Question

$H b^{A} a n d H b^{s}$ alleles of normal and sickle cell haemoglobin are

codominant alleles

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multiple alleles

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polygenic alleles

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cumulative alleles

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Solution

The correct option is A codominant alleles
SCA(sickle cell anaemia) is inherited as a co-dominant trait, in the following manner:

HbA - Symbol of the gene for "normal" hemoglobin

HbS - Symbol of the gene for "sickle" hemoglobin
Both the genes express themselves.

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Q. Sickle cell anemia is a genetic disorder caused by a substitution mutation in the gene encoding hemoglobin, the protein on blood cells responsible for carrying oxygen. This mutation causes the hemoglobin protein to fold incorrectly, preventing the protein from carrying oxygen to the red blood cells.
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If two heterozygous individuals mate and produce offspring, what proportion of their offspring are expected to have fully sickled red blood cells?

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HbA and Hbs alleles of normal and sickle cell haemoglobin are

The correct option is A codominant allelesSCA(sickle cell anaemia) is inherited as a co-dominant trait, in the following manner: HbA - Symbol of the gene for "normal" hemoglobin HbS - Symbol of the gene for "sickle" hemoglobin Both the genes express themselves.

$H b^{A} a n d H b^{s}$ alleles of normal and sickle cell haemoglobin are

The correct option is A codominant alleles
SCA(sickle cell anaemia) is inherited as a co-dominant trait, in the following manner:

HbA - Symbol of the gene for "normal" hemoglobin

HbS - Symbol of the gene for "sickle" hemoglobin
Both the genes express themselves.