Mateo's Mother Tells the Nurse That He Keeps Scratching the Areas

question 29

Multiple Choice

Mateo's mother tells the nurse that he keeps scratching the areas where he has poison ivy.How should the nurse respond?

• A) Poison ivy does not itch and needs further investigation.
• B) Scratching the lesions will not cause a problem.
• C) Scratching the lesions will cause the poison ivy to spread.
• D) Scratching the lesions may cause them to become secondarily infected.

---

Definitions:

Genetic Equilibrium

The condition of a population that is not undergoing evolutionary change (i.e., in which allele and genotype frequencies do not change from one generation to the next). See Hardy–Weinberg Principle.

Allele Frequencies

The proportion of various alleles of a gene in a population, which can change over time due to evolutionary pressures, genetic drift, mutation, and gene flow.

MN Blood Type

A blood group system classifying human blood based on the presence or absence of the M and N antigens on the surface of red blood cells.

Genotype Frequency

The proportion of a particular genotype in the population. Compare with allele frequency and phenotype frequency.