BIO1011 Lecture Notes - Lecture 12: Genotype Frequency, Allele Frequency, Gamete
6 Aug 2018
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Bio1011 lecture 12 population & evolutionary genetics. Population and evolutionary genetics is the study of genetic variation in populations and in evolution: how genetic variation arises, how it varies, how it is maintained. Population-in genetics defined as a localised group of interbreeding individuals of the same species. All the alleles of a gene in a population make up the gene pool. Many traits show variation in a population, called polymorphism-(cid:373)ultiple (cid:862)(cid:373)orphs(cid:863) or for(cid:373)s of a trait. Variation or polymorphism in traits can be examined at different levels: Most genes are polymorphic more than one allele present in population. If only one called monomorphic and allele is fixed in population. In drosophila comes in different forms called allozymes: migrate differently in gel electrophoresis called fast and slow forms. Before dna methods were available, allozymes were used widely to study variation in populations. Can define genetic structure of a population by frequencies of different genotypes, or by frequencies of alleles.
