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:

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation:

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.