Frequently Asked Questions...
Critical Thinking... 10 points!!!!!!?
If a cow develops a preference for eating white four o'clock flowers and ignoring pink and red four o'clock flowers, what type of selection is being demonstrated? How would the cow eventually eliminate all white four o'clock flowers from the population on which it feeds?
Thanks!
Answer:
> what type of selection is being demonstrated
Directional selection. (I am assuming that "red" and "white" are incompletely dominant and the pink is the heterozygote).
> How would the cow eventually eliminate all white four o'clock flowers from the population on which it feeds?
As long as the population of flowers is finite, continuing to preferentially eat the white ones will eventually eliminate the white allele, and all plants will be red-flowered. Genetic drift can speed this process, i.e. the cows eat or step on some immature plants before they have reproduced. (I wrote a computer program to perform this simulation, actually. It was pretty surprising how few generations it took to eliminate the allele.)
Red Four
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What's The Most Effective PS3 Red Blinking Light Repair?
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