Biology Questions

The Mendelian expectation of F2 frequencies in a single-locus cross, with complete dominance and no dominance

Self-starting evolution, which is initiated by a change within the organism rather than a change in the environment (with examples)

Predicting whether evolution by natural selection can keep up with global climate change: the case of the prairie legume Chamaecrista fasciculata

Re the original SARS of 2002-2003, how to determine that captive civets were the immediate source of the virus for humans, and that wild civets are not infected. How to determine that Rhinolophus bats were the most likely reservoir.

How to tell that a morphological similarity is a convergence (using phylogeny and a detailed look at the morphology)

Phylogenetic evidence that HIV-1 spilled over from chimpanzees three or four times, each time from southeastern Cameroon

a universal gene is needed to make a universal tree

For what kinds of viruses will the genealogical approach be most easily applied?

The continuity of life between any two extant organisms (one generation at a time by way of their common ancestor)

A change in allele frequency at one locus does not result in the change in allele frequency at a second locus. These loci are most likely:Select one:a. linkedb. recessivec. dominantd. unlinked

This individual believed that any dominant, Mendelian trait should occur in a 3:1 ratio.Select one:a. G. Udny Yuleb. G. H. Hardyc. Reginal Punnettd. Gregor Mendel

Which of the following statements regarding RNA versus DNA is true?Select one:a. Only RNA uses guanineb. Only RNA uses cytosinec. Only RNA uses uracild. Only RNA uses adenine

The C-value paradox states that "despite the seemingly large differences in organismal complexity, multicellular eukaryotes tend to have similar numbers of protein coding genes".Select one:TrueFalse

Bacteriophage MS2 was the first organism to have its entire genome sequenced, and this was facilitated by:Select one:a. the bacteriophage's long and complex genome.b. previous sequencing of bacterial genomes.c. the bacteriophage's role as a human pathogen.d. the bacteriophage's exceptionally small genome.

If a base substitution creates a stop codon where there was not one previously, this is known as a nonsense mutation.Select one:TrueFalse

Loci on different chromosomes segregate:a. Independentlyb. Dependently

Antibiotic resistance is best described as an example of:Select one:a. Purifying selectionb. Periodic selectionc. Genetic hitchhikingd. Background selection

Consider a population with two loci (A, B), each with two alleles (A, a ; B, b). What are the allele frequencies in this population if the haplotype frequencies are AB = 0.35, Ab = 0.15, aB = 0.35, ab = 0.15?Select one:a. A = 0.6, a = 0.4, B = 0.7, b = 0.3b. A = 0.5, a = 0.5, B = 0.7, b = 0.3c. A = 0.7, a = 0.3, B = 0.5, b = 0.5d.A = 0.5, a = 0.5, B = 0.6, b = 0.4

Herman Nilsson-Ehle determined that the presence of only two variants (AKA alleles) at each of 10 different loci was sufficient to generate as many as 60,000 phenotypes.Select one:TrueFalse

Linkage disequilibrium, or the statistical association between alleles at two loci, can arise due to both the physical distance between two loci on a chromosome and genetic drift.Select one:TrueFalse