frequency? - Biology Forum

last updated by

biohelp22 18 years, 3 months ago

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- April 24, 2006 at 8:27 pm #4595
  biohelp22
  Participant
  You sample a population of butterflies and find that 42% are heterozygous for a pareticular gene. what would be the frequency of the recessive alle in this population?
  .09
  .3
  .49
  .7
  cant be determined
  i think its .7 but im not sure
- April 24, 2006 at 8:51 pm #47279
  sdekivit
  Participant
  can’t be determined
  heterozygous individuals have the frequency 2 * p * q
  –> 2 * p * q = 0,42
  now what are the correct numbers for p and q ? different combinations are possible.
  You can’t determine what the frequency of the recessive allele is with only this number.
  and even though it would be 0,7, why now q = 0,7 and not p = 0,7 (while the other allelefrequency is 0,3) ?
- April 24, 2006 at 8:59 pm #47281
  biohelp22
  Participant
  i hate when theres questions like that, they always trick me
  thanks for the help
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