Which of the following would be a situation similar to genetic drift?
a. Fill a bag with 200 pennies and 200 dimes. Pull out two coins and write down the results. If two dimes are pulled, throw them back in. Do this 50 times.
b. Randomly pull out two beads from a bag of 500 red beads and 500 yellow beads. Do this 100 times, getting an average of 100 yellow beads and 100 red beads by the end.
c. Flip a coin twice and write down the results. Do this four times. The coin comes up heads each time.
d. Fill one bag with 300 blue marbles and another bag with 150 blue marbles and 150 green marbles. Move 10 random marbles from the mixed bag to the bag with all blue marbles.
Ans: c. Flip a coin twice and write down the results. Do this four times. The coin comes up heads each time.
You might also like to view...
Thick-skinned rhinoceroses and elephants were once classified together as pachyderms. They actually descended from different ancestors that in turn evolved from a thin-skinned common ancestor that was not included in the pachyderms. Pachyderms were therefore, as a taxon,
A. polyphyletic. B. polygenetic. C. paraphyletic. D. a supergroup. E. a kingdom.
In the dark, the Na+ channels in the outer segments of rod cells are
A. open. B. closed. C. primarily affected by inhibitory neurotransmitter input. D. important in making the cell hyperpolarized in this resting state.
The study on mutations in germ-line cells indicates all of the following EXCEPT
a. some mutations are inherited from our parents b. some mutations arise as new mutations in the germ-line c. the mutation rates are the same in all families d. more families need to be studied to draw any real conclusions e. this information can be used in medical research
The animal in the above figure is using ____
for protection. a. mimicry b. display behavior c. warning coloration Community Ecology 416 d. chemical defenses e. camouflage