Assertion: Sickle cell anaemia is an example of point mutation. Reason: It occur due change in s

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Assertion: Sickle cell anaemia is an example of point...

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Key Concepts

Point Mutation

A point mutation is a type of genetic mutation where a single nucleotide base is changed, inserted, or deleted from a sequence of DNA or RNA. This small-scale mutation can have significant effects if it occurs within a critical area of a gene, potentially altering the function of the resultant protein.

Single Nucleotide Change

A single nucleotide change, often called a substitution, is the simplest form of mutation, affecting just one nucleotide in the DNA sequence. Such mutations can lead to changes in the amino acid sequence of a protein, which in some cases results in diseases or altered protein functions.

Sickle Cell Anemia

Sickle cell anemia is a hereditary blood disorder caused by a mutation in the gene that codes for the beta-globin subunit of hemoglobin. This mutation, which involves a single nucleotide change, leads to the production of abnormal hemoglobin molecules that can distort red blood cells into a sickle shape, affecting their ability to transport oxygen efficiently.

Beta-globin Gene

The beta-globin gene is responsible for encoding one of the protein subunits of hemoglobin. Mutations in this gene, such as a point mutation leading to a single nucleotide change, can result in abnormal hemoglobin structure and function, as seen in conditions like sickle cell anemia.

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