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Chapter 16-1
Genes & Variation
6
Biology
10th Grade
04/22/2009

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Term
gene pool
Definition
The combined genetic information of all the members of a particular population.
Term
relative frequency
Definition
The number of times an allele occurs in a gene pool compared with the number of times other alleles occur.
Term
single-gene trait
Definition
A trait controlled by a single gene.
Term
polygenic trait
Definition
A trait controlled by two or more genes.
Term
What are the main sources of inheritable variation in a population?
Definition
The two main sources of genetic variation are mutations and the genetic shuffling that results from sexual reproduction.
Term
What determines the numbers of phenotypes for a given trait?
Definition
The number of phenotypes produced for a given trait depends on how many genes control the trait.
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