Show:
Natural selection
Genetic drift
Artifical selection
Gene Flow/Homologie and analogies
evolution of Galapogos
100
Some beetles are green and some are brown.
What is variation in traits?
100
along with natural selection, mutation, and migration — is one of the basic mechanisms of evolution.
What is genetic drift?
100
Your Great Dane and dashound are examples of mankinds intervention in natures process.
What is artifical selection?
100
also called migration — is any movement of individuals, and/or the genetic material they carry, from one population to another.
What is gene flow?
100
______________was the man taht traveled to the Galapogos islands.
Who is Charles Darwin?
200
The surviving brown beetles have brown baby beetles because this trait has a genetic basis.
What is heredity?
200
Genetic drift affects the genetic makeup of the population but, unlike natural selection, through an entirely___________.
What is random process?
200
Long before _____________, farmers and breeders were using the idea of selection to cause major changes in the features of their plants and animals over the course of decades.
What is Darwin and Wallace?
200
Gene flow can be a very important source of ____________.
What is genetic variation?
200
"_____________" and their adaptations eventually provided the basis for his Theory of Natural Selection.
What is Darwin's Finches?
300
If you have variation, differential reproduction, and heredity, you will have evolution by.....
What is natural selection?
300
In each generation, some individuals may, just by chance, leave behind a few more _______________ (and genes, of course!) than other individuals.
What is descendents?
300
farmers have cultivated numerous popular crops from the _________________plant.
What is wild mustard?
300
characters in different organisms that are similar because they were inherited from a common ancestor that also had that character.
What is homologous characteristics?
300
In most populations, the number of species is larger than the available _______________________ is inevitable.
What is resources and competition ?
400
The more advantageous trait, brown coloration, which allows the beetle to have more offspring, becomes more common in the population.
What is end result?
400
The genes of the next generation will be the genes of the "_________" individuals, not necessarily the healthier or "better" individuals.
What is lucky?
400
Farmers and breeders allowed only the plants and animals with _______________ to reproduce, causing the evolution of farm stock.
What is desirable characteristics?
400
Bird and bat wings are _____________ — that is, they have separate evolutionary origins, but are superficially similar because they have both experienced natural selection that shaped them to play a key role in flight.
What is analogous?
400
Within the normal variation that occurs in species, occasionally a ___________________ will occur that will be somehow advantagous to survival or breeding
What is mutation or difference ?
500
Since the environment can't support unlimited population growth, not all individuals get to reproduce to their full potential.
What is differential reproduction?
500
So although genetic drift is a mechanism of evolution, it doesn't work to produce _______________.
What is adaptations?
500
farmers have artificially selecting for _____________ .
What is certain attributes?
500
Analogies are the result of ___________ evolution.
What is convergent?
500
As the offspring are likely to receive these same genetic advantages, they also will be more likely to survive and___________________________ . Those best adapted to their environment,most specified and adaptive, will survive.
What is pass on their genes?