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In fundamental genetics, what best describes the relationship between a gene and an allele?
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1. Introduction to Genetics
Fundamentals of Genetics
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Which of the following best defines a genotype?
A
A change in DNA sequence that creates a new allele
B
The observable traits of an organism resulting from gene expression and environmental influences
C
The genetic makeup of an organism, referring to the specific alleles it carries for one or more genes
D
The complete set of genes present in a species
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Understand that genotype refers to the genetic makeup of an organism, specifically the alleles it carries for particular genes.
Differentiate genotype from phenotype, where phenotype is the observable traits influenced by both genotype and environment.
Recognize that a change in DNA sequence creating a new allele describes a mutation, not genotype itself.
Note that the complete set of genes present in a species refers to the species' genome, which is broader than an individual organism's genotype.
Conclude that the best definition of genotype is the specific alleles an organism carries for one or more genes.
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