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iluvcats

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**HELP on Hardy Weinberg Problem!**

## Homework Statement

the allel for unattached earlobes is dominant over the allele for attached earlboes. in a population of 500 individuals 25% show the recessive pheontype. how many individuals woul you expect to be homozygous dominant and heterozygous for this trait?

## Homework Equations

p^2+q^2=1.0

p^2+2pq+q^2=1.0

## The Attempt at a Solution

q^2=.25

p^2+.25=1.0

p^2=.75

.75 x 500

p^2 =375 people are homozygous dominant

square root of .75 = .87

square root of .25 =.5

2(.87)(.5)

.87

.87 X 500 =435 people are heterozygous

this on one of my many attempts with this problem. i REALLY need some help with it. someone to walk me step by step through it. i know the equation, i have spent plenty of time working on it and i have more of the same problems so if i don't understand one of them than i can't do any. i have looked through all my textbooks and am unable to understand it. so if you could please help me out and help me step by step with so i can understand how to apply the formula to the problem i would really appreciate it. thank you