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level: Level 1 of Natural selection

Questions and Answers List

level questions: Level 1 of Natural selection

QuestionAnswer
Genetic diversitymeasured by the number of different alleles in a population
Gene poola gene pool is a collection of all the different alleles of a gene in pop species
Causes of variation- Gene mutation- sudden changes to genes/chromosomes - Meiosis- new combinations - Random fertilisation- - Environmental factors
Beneficial adaptationincrease the chance of survival Behavioural - playing dead, dancing before mating Physiological - bears hibernating Anatomical - shape , layer of skin
Types of natural selectionDirectional selection - one extreme characteristic in environmental Stabilising selection - middle range of characteristics due no change in environmental conditions Disruptive selection - two extreme characteristics
Mnenomic to describe the processvery awesome crabs seek raunchy females tonight variation alleles change survive reproduce frequency type of selection
Process of natural selectionA pop has gv due to mutations Different alleles - produce new alleles that not all individuals will have favourable alleles a change in environment or no change survive or die depending on favourable alleles survivors with fave will reproduce passing on these genes the allele freq for the favourable al increases dir ses or stab ses or dis ses