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Summary on Evolution by natural selection - Life Sciences (Biology) R95,00   Add to cart

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Summary on Evolution by natural selection - Life Sciences (Biology)

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An in-depth summary from the Textbook, Life Sciences Study Guide by E Russell. Provides a clear understanding of topics such as Variation, Evidence of evolution, Lamarkism , Darwinism , artificial selection, speciation and evolution in present times.

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  • January 22, 2024
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  • 2023/2024
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Evolution by natural selection
thffilitith
onstatesthata

organismsweseetodayarosefrom EVIDENCE
thatexistedinpast
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periodoftime Process i coveredinsediment
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, ARIATION
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OURCES
OFVARIATION meiosis mutations reproduction
meiosis crossingover randomarvangementoschromosomes

crossingover newcombinationsofmaternal paternalmaterial
chromatidsinhomologous
prophase non
sister pairswapgeneticmaterialrandomly
Randomarrangementofchromosomes
chromosomesarrangedat eavatorranoomanounpredictable
homologous

mutations changesstructureofgenechromosome genotype DNAreputation
occurduring
genotype influencesphenotype newdiffcharacteristics
fromonegenerationto thenext
poolchange
fixedin population gene
typesofmutations Neutralsilent noconsequences noeffect
Detrimentallethal leadsto withsynthesisofproteins
death problems
usefuladvantageous betterprotein characteristics better
made NBfornaturalseleition

reproduction randomfertilisation Randommating
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cells ovageniticallyditt fertilisationrandom

Randommating naturalpopulations leadtodiffsetotottspringtrommatingpair
matingmechanisms hierarchiesbetweenmalesfemales selectionby
females


ypesOFVARIATION continuous discontinuous significant
continuous JeanBaptistede
Lamarck 1744 1829
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particularcharacteristics forparticular characteristic linkedtoevironment
diversity
inheritance
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charlesyell 17971875
polygenicinheritance
ofsingle
controlled alleles
by alleles describedgeological
morethanigeneatonelocuson gene multiple processes


mummy EarthBillonsotyearsold

Environmenthareffecton hasnoinfluence
Environment Alfred Wallace outlinedspeciation survivaloffittest
Russel
phenotypicexpression onphenotypes Mandel principlesofinheritance
Gregor and
lawsofgenetics
Linegraph Bargraph Darwin Originotspecies
Charles

bellshapedcurve discontinuous bellcurve

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