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Understanding Pleitropism

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Questions and Answers

Which of the following options best illustrates pleitropism?

A mutation in a single gene that results in various changes in the organism's phenotype. (correct)

Three different genes that each control a specific characteristic.

Two genes regulate different traits in an organism.

Multiple alleles of a gene that determine a singular trait expression.

What does the term pleitropism describe?

The presence of several alleles in a single gene.

The presence of two alleles in a single gene.

A single gene affecting multiple phenotypic expressions. (correct)

More than two genes influencing a single trait.

Which statement about pleitropism is correct?

It denotes the presence of only two alleles in a single gene.

It is synonymous with polygenic inheritance.

It refers to multiple traits being influenced by one gene. (correct)

It involves the interaction of more than two genes affecting one phenotype.

What is a key aspect of pleitropism?

<p>Only one allele contributes to multiple traits.</p> Signup and view all the answers

In genetic contexts, how does pleitropism differ from polygenic inheritance?

<p>Pleitropism focuses on single genes influencing several traits.</p> Signup and view all the answers

Study Notes

Pleitropism

Pleitropism is a phenomenon where a single gene influences multiple phenotypic traits.
It occurs when a gene product participates in different biochemical pathways or affects multiple cellular processes.
This contrasts with the concept of polygenic inheritance, where multiple genes contribute to a single trait.
The text provides an example of Pleitropism in option 2.
For example, a single gene affecting multiple phenotypic characters.
The other examples given in the text are not related to Pleitropism.

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Description

This quiz explores the concept of pleitropism, where a single gene influences multiple phenotypic traits. Distinguishing pleitropism from polygenic inheritance, participants will learn about the biochemical pathways involved. Ideal for students studying genetics and molecular biology.