H - Weezy Problem
q ^2
|
(given) .41
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q
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.64
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p
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.36
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p ^2
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.13
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2pq
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(2)(.36)(.64) = .46
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p^2 + 2pq + q^2
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(.13) + (.46) + (.41) = 1
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# of homo dominant
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q^2 = .41 = 41%
(q^2 x 1000) = (.41 x 1000) = 410
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# of homo recessive
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p^2 = .13 = 13%
(p^2 x 1000 = (.13 x 1000) = 130
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# of heterozygous
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2pq = .46 = 46%
(2pq x 1000) = (.46 x 1000) = 460
|
We are given the value q^2 (homozygous dominant) of .41 and an initial population of 1000 individuals.
Step 1: Find q by taking the square root of q^2 which equals .64
Step 2: Find p by knowing q + p = 1, therefore 1 - .64 = .36
Step 3: Find p^2 by taking p and squaring it, or multiplying it by itself. .36 x .36 = .13
Step 4: Find 2pq by plugging in the values p and q. (2)(.36)(.64) = .46
After finding all values, I then found the # of homo dom. individuals, # of homo rec. individuals, and # of heterozygotes in the population.
In order to do so, I multiplied the value of q^2 (.41) ,which also equals 41% of the population, by the total population (1000) and got 410 individuals.
The number of individuals that contain the homozygous recessive alleles are 13% of the population which is 130 individuals, which is found by multiplying p^2 by the total population as well.
Lastly, the number of heterozygous individuals takes up 46% of the population which is 460 individuals. This is found by multiplying 2pq by 1000, the total population as well.
You did well, making the steps very clear and simple while also getting the correct answers.
ReplyDelete
ReplyDeleteCorrect answers, and very well organized. Well done overall.