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Biology 🧪
Variation and evolution
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Created by
Agatha Steed
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Cards (26)
What can lead to huge variation between individuals?
Differences in
genes
and
environment
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What is the process called that can lead to the evolution of new species?
Natural selection
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What term describes the differences among individuals in a population?
Variation
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What does a phenotype describe?
Observable
characteristics
of an individual
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What two factors interact to determine a phenotype?
Genes
and
environment
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What do genes code for?
Proteins
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What is a genome?
All of your
genes
combined
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Why does everyone have a unique genome?
Different combinations of
proteins
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How can identical twins differ in height?
Due to differences in
environment
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What can affect the skin color of identical twins?
Sun exposure
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What influences most of our traits?
Interaction of
genes
and
environmental
factors
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What causes genetic variation?
Mutations
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What is a mutation?
A change in the
DNA
code
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What is the effect of most mutations on phenotypes?
They have no effect
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What can beneficial mutations do?
Enhance
survival
and reproduction
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Who proposed the idea of survival of the fittest?
Charles Darwin
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What did Darwin observe about traits in populations?
Useful traits were
passed on
more
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What does natural selection describe?
Fittest
individuals are selected to survive
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What does evolution describe?
Inheritance of
characteristics
over
generations
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From what do all current species evolve?
Different species in the
past
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What does the theory of evolution imply about all living species?
They evolved from simple life forms
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What evidence supports Darwin's theory of evolution?
Antibiotic
resistance and
fossil
records
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What is the summary of evolution through natural selection?
Evolution occurs through natural selection
Genetic changes
lead to
advantageous
phenotypes
Over time,
populations
may diverge
New
species
can form when
interbreeding
ceases
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What happens when two populations can no longer interbreed?
A new
species
has formed
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What is the time frame for evolution to occur?
Given
enough
time
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What should you do if you enjoyed the video?
Like and subscribe
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