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University of Toronto Scarborough
Biological Sciences
Kamini Persaud

thomas malthus -evolution/natural selection keep human population in check , such as famine and suicide darwinism logic: focus on 'trait' increasein frequency modern evolution approach: focus on 'allele' increase in frequency so fitness benefit can be defined in two ways positive effect on the trait on the number of surviving offspring , or t what determines what is the most 'adv pheno'? -enioenemnt but note that environemnt NOT cause evolution / phenotypes differentces the genetic variation is already there, the the enviroment acts as a agent, to eliminate more type A than type B species so type B animals survive more, and you see the evolutionary changes . so environment just reveals ( by eliminating the lesss advang pheno) the underlying genetic variation, which is already present in the population --example: you see different types (sized differently ) of guppy in the upstream and downstream --example 2: xenophobia( rejection of same specices, even different genders in more frequent in the arid environment --there has to be a time where you have both xenophobia mole rats, and normal ones in the arid environment, but as the local envion is very limited for food, the envionr acts on the mole rats( phenotype), and leaves more xenophobia mole in the arid --same process happens viral vector to transfer( insert) a gene into the animal of interested to study a behaviour -caus you suspect hat this gene is responsible for this behaviour -example: vasopression for fidelity/sociality what is cross fostering? --take the kids away from the genetic parents, and let some different parents( enieonr) to rear it up , so that the two k
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