Population Allele Frequency and Heterozygotes in H-W Equilibrium

[komal12]

A population has two alleles, B and b. the allele frequency of B is 0.73. what is the heterozygotes frequency, if the population is in H-W equilibrium?

 

[Astronuc]

How about writing the appropriate equation for HARDY-WEINBERG equilibrium.

Look at

http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/H/Hardy_Weinberg.html

 

[Oaksinstructor]

two major important equations for Hardy-Weinberg:
p + q = 1
and p^2 + 2pq + q^2 = 1

You know 'p' in your problem: it is .73 Therefore you must know that 'q' is .27
since you know p = .73 and q = .27 you can find 2pq (which is the heterozygote frequency)
{Moderator edit: remainder of solution deleted. The student can solve from here on their own.}