1. Chapter 16 Section 1 Genes and Variation
Biology pgs

2. Objectives Explain Identify State _____________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