Describe the journey of a hypothetical enveloped (-) RNA virus through three basic host barriers to infection: Physical b arriers, Innate immune response and adaptive immune response. After overcoming physical barriers, how are viruses recognized at each step, what cells are involved, what soluble factors are involved, which adaptive immune […]

1. In each of the following types of growth, how is the rate of growth (dN/dt) influenced by the population size (N)?Linear:Exponential:Logistic: 2. Note the following data concerning two species of paramecia. The abiotic factors (growth medium, temperature, etc) are identical in all flasks. Is there evidence of competition between […]

A cross in corn is carried out with three linked genes in a triply heterozygous genotype for the alleles pairs (A, a), (D, d), and (R, r). The dominant allele A results in red leaves; aa plants have green leaves. The dominant allele D results in tall plants; dd plants […]

Question: The following effective population sizes were recorded for a population over 5 generations; 100, 120, 17, 40, 88. Estimate the harmonic mean estimate of effective population size for this population?Question: Imagine you have two populations of size N = 4 and N = 20. Allele frequencies in each population are as […]