Chapter 17, Microevolution: Evolution of Populations Video Solutions, Must Know High School Biology

Problem 1

The Hardy-Weinberg equation is a way to check the allele frequency of a population, but only if the population in question meets five conditions. List them.

Chase Crook

Numerade Educator

06:14

Within a population of 251 snails, the shell color brown (B) is dominant over the shell color tan (b), and $40 \%$ of all snails are tan. Given this information, calculate the following:
a. The number of snails in the population that are heterozygous.
b. The number of homozygous dominant individuals.

Dennis Howard

Numerade Educator

04:12

Problem 3

If a population suddenly suffers a drastic reduction in numbers due to a catastrophic lava flow, the remaining population will eventually repopulate. The reestablished population has very little genetic diversity due to the

Breanna Kloczkowski

Numerade Educator

02:53

Problem 4

A population of stinkbugs range from slightly smelly to extremely smelly, with the majority of bugs with the medium-smelly phenotype. If a predator began to only eat the medium-smelly bugs,
explain what kind of selection this describes.

John Barone

Numerade Educator

02:13

Problem 5

Write the Hardy-Weinberg equation that tallies the different alleles for a given gene:

Next, write the equation that summarizes all the given genotypes possible:
Explain what each component of the equation stands for.

Josee Pacheco

Numerade Educator

12:04

Problem 6

The ability to taste the chemical phenylthiocarbamide (PTC) is due to a gene that codes for a receptor in the taste buds. The two most common alleles for this gene are the dominant tasting allele (T) and the recessive non-tasting allele ( $\mathrm{t}$ ). You sampled 220 individuals and determined that 150 could detect the bitter taste of PTC and 70 could not. Calculate the frequencies of both alleles in this population.

Bryan Valdivia

Numerade Educator

05:58

Problem 7

Evolution in a population that occurs because of a chance change in allele frequency is referred to as

For example, a small number of individuals may leave their original population and start their own. If these colonizing individuals happen to carry an assortment of that are not similar to their original population, their new population will have a different This is an example of