Multiple Choice
The crossover percentage between two different genes is:
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3. Extensions to Mendelian Inheritance
Understanding Independent Assortment
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Which term describes a gene that is always expressed, regardless of the alleles present at other loci?
A
Dominant gene
B
Linked gene
C
Recessive gene
D
Epistatic gene
Verified step by step guidance1
Understand the concept of gene expression and how it can be influenced by other genes at different loci.
Recall that a dominant gene is one that expresses its trait even if only one copy is present, but its expression can sometimes be influenced by other genes.
Consider the term 'epistatic gene,' which refers to a gene that can mask or suppress the expression of genes at other loci, meaning it is expressed regardless of other alleles.
Recognize that 'linked genes' are genes located close together on the same chromosome and tend to be inherited together, which does not necessarily relate to constant expression.
Conclude that the gene always expressed regardless of alleles at other loci is best described as an 'epistatic gene,' because it overrides the effects of other genes.
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