Category: Uncategorized

What are the sterilization conditions for autoclaving?

When is Tryptic Soy Agar used?

Modern dichotomous keys are derived from what reference material?

Why might a microbiologist prefer to use broth culture over solid culture?

What is the purpose of a dichotomous key in microbiology?

What is Bergey’s Manual of Systematic Bacteriology? What information does it contain?

Based on the Darwinian Snails lab, if shell thickness is NOT heritable, how many generations of snails does it take before the crabs cause most snails to have very thick shells?

Huntington’s disease is caused by a mutation in the huntingtin gene, HTT.  The mutant allele that causes the disease is dominant to the normal allele. Most people with the disease first notice symptoms between the ages of 30 and 50. Symptoms include mood and behavioral changes and tremors, to name a few. Most people die within 20 years of their diagnosis. Claudette and Garbanzo get married and have two children, Lola and Moose. Garbanzo is diagnosed with Huntington’s in his 50s, and Lola is diagnosed with Huntington’s at age 36. Claudette and Moose are never diagnosed with the disease, and both live into their 80s. Use h to refer to the functional huntingtin allele, and H to refer to the huntingtin allele that causes Huntington’s disease. What are the genotypes of all 4 individuals in the family for the huntingtin gene? Claudette [a1] Garbanzo [a2] Lola [a3] Moose [a4]

Based on the Darwinian Snails lab, periwinkle snails living in New England 100 years ago had shells that were

Simploids are a fictitious species of animal. One population of Simploids lives in Brighton, a region that receives full sun 80% of the time. Another population of Simploids lives in Shady Grove, an area that is often cloudy and rainy. All Simploids have a gene called SUN1, which protects against the harmful UV rays from the sun. The Simploids living in Brighton are much more likely to have an allele of the SUN1 gene that offers more UV protection, compared to those from Shady Grove. You perform a reciprocal transplant with Simploids from both populations and find that Simploids have higher fitness when reared in their native environment. What does your experiment show evidence for? [a1] Some Brighton Simploids with the high-protection SUN1 allele decide to move to, and join, the Shady Grove population. Has the Shady Grove population evolved? [a2]