Chapter 23 Notes Continued

Chapter 23 Notes Continued -...

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Chromosomal mutations: delete, disrupt, or rearrange many loci o Usually harmful especially in duplications of large chromosomes Mutation rates are low in animals; high in viruses Sexual reproduction can shuffle existing alleles into new combinations and does not  create new alleles o In organisms that reproduce asexually, this occurs more often Gene pool consists of all the alleles for all the loci in a population A locus is fixed if all individuals in a population are homozygous Frequency of all alleles in a population will add up to 1. o p + q = 1 Hardy Weinberg Principle describes a population that is not evolving o Frequencies of alleles and genotypes in a population remain constant from  generation to generation o Describes a constant frequency of alleles in such  a gene pool o p 2  + 2pq + q 2  = 1 Hardy Weinberg Theorem describes a hypothetical situation o Conditions to be met
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Chapter 23 Notes Continued -...

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