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Understanding Gene Pools and Inheritable Variation in Populations

This chapter explores the concept of gene pools, which represent all the genes and their variations within a specific population. It highlights the main sources of inheritable variation, including mutations and sexual reproduction. Additionally, it examines the determinants of phenotype expression and defines key terms such as relative frequency and genetic variation. Understanding these concepts is essential for studying evolution and the diversity of life forms, as they demonstrate how traits are passed on and how populations change over time.

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Understanding Gene Pools and Inheritable Variation in Populations

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  1. Chapter 16 Section 1Genes and Variation Biology pgs. 393-396

  2. Objectives _____________what a gene pool is _____________the main sources of inheritable variation in a population ___________what determines how a phenotype is expressed Explain Identify State

  3. Gene Pool • A ____________is a group of individuals of the same species that interbreed. • A _____________consists of all genes, including all the different alleles, that are present in a population. population gene pool

  4. Relative Frequency The ________________of an allele is the number of times the allele occurs in a gene pool, compared with the number of times other alleles for the same gene occur. relative frequency

  5. Genetic Variation • In genetic terms, evolution is any ____________in the relative frequency of alleles in a population. • The two main sources of genetic variation are ____________and the genetic shuffling that results from sexual reproduction. change mutations

  6. The number of ____________produced for a given trait depends on how many genes control the trait. phenotypes

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