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In genetics, what is an allele?
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1. Introduction to Genetics
Fundamentals of Genetics
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In genetics, what is an allele?
A
An alternative form of a gene found at a specific locus on a chromosome
B
A noncoding region of DNA located between genes with no regulatory function
C
A complete set of chromosomes characteristic of a species
D
A segment of RNA that makes up the ribosome
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Understand that in genetics, a gene is a segment of DNA that codes for a specific trait or function.
Recognize that genes can have different versions, which are called alleles. These alleles occupy the same position, or locus, on homologous chromosomes.
Recall that an allele represents an alternative form of a gene, which can result in variations in the trait that the gene controls.
Differentiate alleles from other genetic elements such as noncoding DNA regions, complete chromosome sets, or RNA segments involved in ribosome structure.
Conclude that the correct definition of an allele is an alternative form of a gene found at a specific locus on a chromosome.
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