BIO120H1 Lecture Notes - Lecture 16: Population Genetics, Zygosity, Theodosius Dobzhansky

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10 Jan 2012

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Fischer: theoretician, mathematician, and showed that there is a relationship between the amount of genetic variability in a population and its ability to evolve; e. g. - low variability = not good for the populations ability to grow. Fischer and haldane tried to fuse the idea of genetics with. Darwin s theory of evolution; they fused mathematics and genetics and put that with darwin s thepry = Ecological genetics: studying observable variation in phenotypes that was then studied genetically. We d like to know how much and what type of genetic variability for ex, quantitative variablilty (large distribution of phenotypes, polygenes) and ones that are controlled by small numbers of genes mendelian traits , major & minor. Can t test these predictions unless we can measure these. Polymorphism is the proportion of genes that are polymorphic, so for example, measure for a pop of 0. 6, then 60% of the genes sampled were poly and therefore variable.

Related Questions

What are the two means by which meiosis introduces genetic variation into the gametes? When does each occur during meiosis? What are some facts/formulas regarding each that help to determine how much genetic variability can be introduced into the gametes by meiosis? What is a third way that genetic variation can be introduced into offspring, albeit only after gametes have been produced?

Hi, please answer both questions if possible! Thanks in advance.

1. In a sentence name two types of genetic drift. Then write a sentence or two to differentiate between the two using specific examples. Finally, in a paragraph, explain how genetic drift might allow a few individuals of a species to adapt to a variety of different habitats in a new location (a phenomenon known as adaptive radiation).

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BIO120H1 Lecture Notes - Lecture 16: Population Genetics, Zygosity, Theodosius Dobzhansky

BIO120H1 Full Course Notes

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