In Mexico, about 16% of the population is left handed. The allele for left handedness is recessive to right handedness. If 2000 fans attended a football match, how many would you expect to have the three possible genotypes (RR, Rr, rr)?

720 fans will have the RR genotype

960 fans will have the Rr genotype

320 will have the rr genotype

Explanation:

The allele for left handedness (r) is recessive to right handedness (RR).

The possible genotypes and phenotypes for this gene are:

If we assume the population in Mexico is in Hardy Weinberg equilibrium, the frequencies of each genotype will be:

Where p is the frequency of the R allele and q is the frequency of the r allele.

The frequency of the left handed population (with rr genotype) is 0.16, therefore q² = 0.16.

q² = 0.16

q = √0.16

q=0.4

Since there are only two alleles,  p + q = 1.

Then, p = 1-q = 0.6

Now we can calculate the expected number of people with each genotype in the football stadium with 2000 people:

explanation: grsaa

it is called the mitotic spindle