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• The gene pool is the total number of different alleles that exist
for a population.
• The gene pool is the total number of different alleles that exist
for a population.
• The processes of mutations, natural selection, migration, and
genetic drift all affect the gene pool and change the frequency
of the alleles in that gene pool.
• The gene pool is the total number of different alleles that exist
for a population.
• The processes of mutations, natural selection, migration, and
genetic drift all affect the gene pool and change the frequency
of the alleles in that gene pool.
• Genetic Change therefore refers to the change in frequency of
alleles in the gene pool of a population.
• The gene pool is the total number of different alleles that exist
for a population.
• The processes of mutations, natural selection, migration, and
genetic drift all affect the gene pool and change the frequency
of the alleles in that gene pool.
• Genetic Change therefore refers to the change in frequency of
alleles in the gene pool of a population.
• Frequency of an allele in a population is given by the formula
Frequency of an allele = occurrence of that allele
total number of alleles
• The gene pool is the total number of different alleles that exist
for a population.
• The processes of mutations, natural selection, migration, and
genetic drift all affect the gene pool and change the frequency
of the alleles in that gene pool.
• Genetic Change therefore refers to the change in frequency of
alleles in the gene pool of a population.
• Frequency of an allele in a population is given by the formula
Frequency of an allele = occurrence of that allele
total number of alleles
• The process in which new species develop from earlier forms.
• The process in which new species develop from earlier forms.
• Normally occurs slowly, most often in response to a change in a
species’ environment.
• The process in which new species develop from earlier forms.
• Normally occurs slowly, most often in response to a change in a
species’ environment.
• Life is thought to have evolved from just a few unicellular
organisms three billion years ago.
• The process in which new species develop from earlier forms.
• Normally occurs slowly, most often in response to a change in a
species’ environment.
• Life is thought to have evolved from just a few unicellular
organisms three billion years ago.
• Evolution happens through ‘changes in the frequency of alleles
in a population’ – some alleles do better than others.
• Darwin proposed the theory of Natural Selection more than
150 years ago. It remains the best explanation of adaptive
evolution.
• Darwin proposed the theory of Natural Selection more than
150 years ago. It remains the best explanation of adaptive
evolution.
• Populations typically produce more offspring than the
environment resources can maintain; therefore there is
competition for survival.
• Darwin proposed the theory of Natural Selection more than
150 years ago. It remains the best explanation of adaptive
evolution.
• Populations typically produce more offspring than the
environment resources can maintain; therefore there is
competition for survival.
• Individuals with the best adaptations will survive and reproduce
(fitness) and pass on to their offspring their successful alleles.
• Darwin proposed the theory of Natural Selection more than
150 years ago. It remains the best explanation of adaptive
evolution.
• Populations typically produce more offspring than the
environment resources can maintain; therefore there is
competition for survival.
• Individuals with the best adaptations will survive and reproduce
(fitness) and pass on to their offspring their successful alleles.
• The frequency of these alleles will then increase in the gene pool.
• Darwin proposed the theory of Natural Selection more than
150 years ago. It remains the best explanation of adaptive
evolution.
• Populations typically produce more offspring than the
environment resources can maintain; therefore there is
competition for survival.
• Individuals with the best adaptations will survive and reproduce
(fitness) and pass on to their offspring their successful alleles.
• The frequency of these alleles will then increase in the gene pool.
• Environmental factors act as selecting agents of successful
phenotypes.
• Darwin proposed the theory of Natural Selection more than 150
years ago. It remains the best explanation of adaptive evolution.
• Populations typically produce more offspring than the environment
resources can maintain; therefore there is competition for survival.
• Individuals with the best adaptations will survive and reproduce
(fitness) and pass on to their offspring their successful alleles.
• The frequency of these alleles will then increase in the gene pool.
• Environmental factors act as selecting agents of successful
phenotypes.
• When environmental factors change, different phenotypes will be
selected for = successful genotypes will have their alleles increase
in frequency in the gene pool.
• If the frequency of alleles changes, evolution is occurring.
• If the frequency of alleles changes, evolution is occurring.
• After a certain number of generations, the frequency of the
alleles and phenotypes might change so markedly that the
population becomes reproductively isolated from other
populations of that species – that is the new species.