Multiple Choice
Which term describes a genotype that contains two different alleles at a given locus?
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3. Extensions to Mendelian Inheritance
Variations of Dominance
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Traits can be dominant, which means they can be seen and are capable of masking a different trait. Which term best describes such traits?
A
Recessive
B
Dominant
C
Incomplete dominant
D
Codominant
Verified step by step guidance1
Understand the definition of a dominant trait: it is a trait that is expressed or visible when at least one dominant allele is present, and it can mask the presence of a recessive allele.
Recall that a recessive trait is only expressed when two recessive alleles are present and is masked by a dominant allele if present.
Consider incomplete dominance, where neither allele is completely dominant, resulting in a blended phenotype.
Consider codominance, where both alleles are fully expressed simultaneously without masking each other.
Based on these definitions, identify that the term describing traits that can mask others and are visible when present is 'Dominant'.
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