Speciation Fill In Notes

Questions
The Process of Speciation
A ______________is a group of similar organisms that can potentially _______
and produce ____________ offspring.
Why "fertile"
So what is the difference between a species and a population
- A _________________ is a group of individuals of the __________
species that interbreed and reproduce.
_____________________ is the formation of ___________ species.
Speciation is the ultimate consequence of _________________! Enough change
over time occurs that related organisms can no longer breed and produce fertile
offspring. = ____________________.
__________________________________ occurs when formerly interbreeding
species or populations separate so that they cannot produce fertile offspring.
How do you think reproductive isolation can occur
3 Types of Reproductive Isolation
These are "_________________________ mechanisms" that could lead to speciation.
Isolating = __________________________
1. Geographic Isolation
_______________________________________ occurs when two populations are
separated _____________________________ by geographic barrier.
Ex. rivers, mountains, or stretches of water, lava, _____________________.
Ex. Galapagos finches! different islands, ultimately different species
Ex. The kaibab squirrel lives on the north side of the grand _____________and
the abert squirrel lives on the south side!
Ex. Bonobos are also known as "left bank" chimpanzees.
Chimpanzees are "right bank" chimps. They are separated by the Congo
________________________
How did the pollenpeepers in the PBS activity become geographically isolated

"Temporal" = relating to time
2. Temporal Isolation
__________________________ occurs when two populations reproduce at
different __________________.
Ex. There are 4 groups of Chinook salmon who spawn at different times of the
year along California's central coast: winter, spring, summer and fall. The
populations who breed in one __________________ never breed with those in
another ______________.
3. Behavioral Isolation
_________________________________ occurs when two populations have differences
in ____________________rituals or ____________________ that prevent them from
interbreeding.
Example: eastern and western meadowlarks will not mate with each other
because they use different _________________to attract mates.
Ex. Two species of tree frogs that live side-by-side in the southeastern U.S.
have different ___________________________.
How does isolation lead to speciation
Organisms that are isolated respond differently to _____________________________
and have different ________________________________.
They could ___________________ to become so _________________different
that they can no longer breed and produce fertile offspring.
So, even if they were brought together in a zoo, they still couldn't have fertile
offspring.
Ex. Their chromosomes cannot form homologues in meiosis.
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