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Co-dominance and Multiple Alleles Quiz

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Questions and Answers

What defines multiple alleles in genetics?

More than two alternative forms of a gene at a locus (correct)

Any form of a gene that is dominant

Only two alternative forms of a gene at a locus

A single form of a gene in all populations

What is the primary characteristic of co-dominance?

Both alleles are fully expressed in the heterozygote (correct)

One allele completely suppresses the other

Intermediate characteristics are expressed in the phenotype

Only one allele is expressed in the phenotype

What type of alleles affect wing size in Drosophila?

Recessive alleles only lead to normal wings

Multiple alleles, including dominant and recessive traits (correct)

No alleles influence wing size in Drosophila

Only dominant alleles determine wing size

How does the presence of multiple alleles affect the phenotype ratio in Drosophila?

<p>The ratio depends on the composition of alleles in progeny</p> Signup and view all the answers

Which statement accurately describes vestigial wings in Drosophila?

<p>This trait results in smaller, stump-like wings</p> Signup and view all the answers

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Study Notes

Co-dominance and Multiple Alleles

Co-dominance produces a 1:2:1 genotypic and phenotypic ratio.
Multiple alleles are more than two alternative gene forms found at the same chromosome locus.
Multiple alleles arise from mutations in the wild-type gene.
Alleles in a series may exhibit dominant-recessive relationships, co-dominance, or incomplete dominance.
For example, in Drosophila, wing size varies from normal to vestigial due to a single gene (vg).
The normal wing is the wild type, while the vestigial wing is recessive.

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Description

Test your understanding of co-dominance and multiple alleles in genetics. This quiz covers the concepts of genotypic and phenotypic ratios, the role of mutations, and examples such as wing size variation in Drosophila. Challenge your knowledge on these important genetic principles!