Mutation
What is the definition of evolution?
Extra 25!
Change in allele frequencies over time.
Does evolution act on populations or individuals?
Populations
Evolutionary change always takes a very long time. True or false. DAILY DOUBLE
False. Evolutionary change can happen at different rates and can depend on rate of reproduction.
How can we tell if a population evolved by natural selection and not genetic drift?
The trait is selected, heritable, allele frequency
Give an example of a behavioral adaptation
Daily double
lots
What is a mutation?
A RANDOM change in DNA
What are two types of genetic drift?
Bottleneck and Founder Effect
Besides physical adapdations what kinds are there?
Behavioral, physiological
What is a definition of natural selection?
A change in allele frequencies in a population caused by differential reproductive success of individuals because of their phenotype.
give an example of physiological adaptation...
venom
Mutation is one source of genetic variation what is a different one?
DAILY DOUBLE WHAT?!?!?
Genetic recombination - mixing of alleles dring meiosis and fertilization
examples: independent assortment, random fertilization, and crossing over
What conditions need to be in place for evolution by genetic drift to take place?
No trait can determine survival, it is based off of completely random chance.
What does survival of the fittest mean
best fit for environment gets to survive and reproduce
What scientist is credited for discovering natural selection? *hint! it is not Abraham Lincoln*
Charles Darwin
50 extra points!
What is one consequence of genetic drift?
decrease genetic variation
extra 25?!?
Why is genetic variation important?
Without variation, natural selection cannot lead to evolution in a population. or student can say it leads to evolution, it protects from extinction, etc.
What is the definition of genetic drift?
Change in allele frequencies in a population due to chance events
Why is overproduction a key principle of natural selection?
More offspring are produced than can survive.
natural selection is random, true or false
FALSE
What is "homologous crossing over"
daily double
ms. Lohmann you tell em...
When homologous pairs line up and swap genetic material.
When is the regents?
Extra 100 points!
June 18th
What is an example of genetic drift?
A natural disaster
What selects the favorable traits in natural selection?
Environment
What is the definition of fitness in evolutionary biology?
The overall reproductive success of an individual with a particular phenotype.
What does heritable mean?
ms. lohmann tell em. Traits passed down from parents to offspring