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Kaplan Qbank USMLE



Author12 Posts
  #1

If the number of homozygotes is 1/4900, what is the number of heterozygotes?

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Smell the coffee! "Is That an Osler move??"

  #2

1/700 :?:

  #3

:?: what's the answer, and how did u figure it out: :?:

p2+2pq+q2 = 1

p + q = 1

  #4

homozygotes = p and heterozygotes= q2.Therefore q= square root of 1/4900.

Is it correct :?: mjl has to tell us now

  #5

what is the correct answer mjl ?

  #6

I think 138/4900.

  #7

1/4900 means its q2
then q will be 1/70 by taking square root

considering p = 1
then

2q = 1/70

q = 1/140

If its correct? need to have reply!

  #8

Sorry

2q will be 2/70

and then 1/35

please let me know whats the answer?
thank You!

  #9

Sorry

2q will be 2/70

and then 1/35

please let me know whats the answer?
thank You!

  #10

how did u get 2/70 ???? :roll:

  #11

"mjl1717" wrote:
If the number of homozygotes is 1/4900, what is the number of heterozygotes?


P2 + 2pq + q2 = 1
homozygotes = q2 = 1/4900
q = 1/70
p + q = 1
p = 69/70 = 1
2pq (heterozygotes) = 2 * (69/70) * (1/70) = 1/35

so, 1/35, right?

  #12

Hi

I explained this to Asmi directly.

homozygote 1/4900 means q2

want to have q so square root

q is 1/70

than we assume that p is nearly 1

2pq means

2(1)(1/70)

than 2pq = 2(1)(1/70)

means

2pq = 2/70

2pq = 1/35 ( means actual heterozygote )







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