Multiple Choice
Traits can be dominant, which means they can be seen and are capable of masking a different trait. Which term best describes such traits?
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3. Extensions to Mendelian Inheritance
Variations of Dominance
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A situation where a single individual expresses two different alleles is referred to as:
A
codominance
B
epistasis
C
complete dominance
D
incomplete dominance
Verified step by step guidance1
Understand the definitions of the key terms: codominance, epistasis, complete dominance, and incomplete dominance.
Codominance occurs when both alleles in a heterozygous individual are fully expressed, resulting in a phenotype that shows both traits simultaneously.
Epistasis refers to a situation where one gene affects or masks the expression of another gene, not the expression of two alleles in the same gene.
Complete dominance means one allele completely masks the effect of the other allele in a heterozygote, so only one trait is visible.
Incomplete dominance results in a blended phenotype where neither allele is completely dominant, producing an intermediate trait.
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