Question

Describe multiple allelism and pleotropism with examples.

Answer 1

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▶MULTIPLE ALLELISM:- “Three or more kinds of gene which occupy the same locus are referred to as multiple alleles.”
multiple alleles can be found only when population studies are made.

»Example:- Blood Groups in Man, Wings of Drosophila, Coat Colour in Rabbit.

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▶PLEOTROPISM:- A single gene may have two or more phenotypic expressions. The multiple phenotypic effect of a single gene is called pleiotropism.

»Example:- Phenylketonuria, Sickle cell aneamia.

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Answer 2

Answer:

Multiple alleles are fundamentally different from each other. Pleiotropic gene are not fundamentally different, they result from mutation in a normal regular functioning gene. Pleiotropy is observable only in the phenotype; no genotype change is present.