Podcast
Questions and Answers
What defines multiple alleles in genetics?
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?
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?
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?
How does the presence of multiple alleles affect the phenotype ratio in Drosophila?
Which statement accurately describes vestigial wings in Drosophila?
Which statement accurately describes vestigial wings in Drosophila?
Flashcards
Multiple Alleles
Multiple Alleles
More than two forms of a gene at the same locus, often arising from mutations.
Co-dominance
Co-dominance
When both alleles are expressed in the heterozygote, resulting in a phenotype that combines both traits.
Vestigial Wings
Vestigial Wings
A trait in Drosophila (fruit flies) that results in smaller, stunted wings. It's a recessive allele.
Normal Wings
Normal Wings
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Inheritance Ratio
Inheritance Ratio
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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!
