Which of the following is a characteristic of a dominant allele?
Practice Questions
1 question
Q1
Which of the following is a characteristic of a dominant allele?
It is always expressed in the phenotype
It can be masked by a recessive allele
It is only expressed in homozygous conditions
It is less common in a population
A dominant allele is expressed in the phenotype even when only one copy is present, masking the effect of a recessive allele.
Questions & Step-by-step Solutions
1 item
Q
Q: Which of the following is a characteristic of a dominant allele?
Solution: A dominant allele is expressed in the phenotype even when only one copy is present, masking the effect of a recessive allele.
Steps: 5
Step 1: Understand what an allele is. An allele is a version of a gene that can determine a specific trait.
Step 2: Learn about dominant alleles. A dominant allele is a type of allele that can express its trait even if there is only one copy of it.
Step 3: Know what phenotype means. The phenotype is the observable physical or biochemical characteristics of an organism.
Step 4: Recognize the relationship between dominant and recessive alleles. A dominant allele can mask the effect of a recessive allele, which only shows its trait if two copies are present.
Step 5: Conclude that a characteristic of a dominant allele is that it is expressed in the phenotype even when only one copy is present.
