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Intro Breeding Bunnies lab. W.E. Castle discovered hairless rabbits (ff) in 1933. They would be very useful in a microevolution experiment. Now if I had 50 bunnies that were carriers for hairless-ness (Ff), I could put them in an isolated meadow in England. - PowerPoint PPT Presentation
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Intro Breeding Bunnies lab
W.E. Castle discovered hairless rabbits (ff) in 1933. They would be
very useful in a microevolution
experiment.
Now if I had 50 bunnies that were carriers for hairless-ness (Ff), I
could put them in an isolated meadow in
England
Letting nature take its course…they would breed like bunnies. Any hairless
rabbits (ff) would not survive the cold winter…
thus being eliminated from the gene pool.
I would record each offspring produced each
generation. And, then use that data I could calculate
the changes in gene frequency
(microevolution) of the F allele and f allele.
OK…Now I just need a Grant to pay for the
research, convince my parents to let me go on
travel study, A passport….Hum, maybe I could come
up with a model experiment
Converting the proposed experiment with live animals into an experiment with model animals
F f F f F f F f F f F fF f F f F fF f
F f F f F f F f F fF f F f F fF f F f
F f F f F f F f F fF f F fF f F fF f
F f F f F f F f F fF f F fF f F fF f
F f F f F f F f F fF f F fF f F fF f
Converting the proposed experiment with live animals into an experiment with model animals
F f F f F f F f F f F fF f F f F fF f
F f F f F f F f F fF f F f F fF f F f
F f F f F f F f F fF f F fF f F fF f
F f F f F f F f F fF f F fF f F fF f
F f F f F f F f F fF f F fF f F fF f
I could use beans to represent the alleles of
each bunny“F” allele “f” allele
Converting the proposed experiment with live animals into an experiment with model animals
F f F f F f F f F f F fF f F f F fF f
F f F f F f F f F fF f F f F fF f F f
F f F f F f F f F fF f F fF f F fF f
F f F f F f F f F fF f F fF f F fF f
F f F f F f F f F fF f F fF f F fF f
Converting the proposed experiment with live animals into an experiment with model animals
F f F f F f F f F f F fF f F f F fF f
F f F f F f F f F fF f F f F fF f F f
F f F f F f F f F fF f F fF f F fF f
F f F f F f F f F fF f F fF f F fF f
F f F f F f F f F fF f F fF f F fF f
Converting the proposed experiment with live animals into an experiment with model animals
Model Meadow Put the bunny alleles in the Bag mating
Converting the proposed experiment with live animals into an experiment with model animals
Model Meadow
Put the bunny alleles in the Bag mating
Draw 2 alleles out at a time bunny born
Converting the proposed experiment with live animals into an experiment with model animals
Model Meadow
Put the bunny alleles in the Bag mating
Draw 2 alleles out at a time bunny born
Repeat until bag empty complete generation
Converting the proposed experiment with live animals into an experiment with model animals
Model Meadow
Record Data calculate gene frequency F & f
Converting the proposed experiment with live animals into an experiment with model animals
Model Meadow
Record Data calculate gene frequency F & f
Repeat 8 times eight generations of bunnies
Converting the proposed experiment with live animals into an experiment with model animals
Model Meadow
Record Data calculate gene frequency F & f
Repeat 8 times eight generations of bunnies
Graph microevolution: change in allele frequency over time
So…
• What would be the research question of this lab?
So…
• What do you predict will happen to the percentage of f (NO fur alleles) in the bunny population over 8 generations?– Why?
• What do you predict will happen to the percentage of F(fur alleles) in the bunny population over 8 generations?– Why?
Write a formal hypothesis: If blah blah blah, then blah blah blah blah