Two genes are on the same chromosome, yet crossing over occurs between them every time meiosis
occurs. Are these genes linked or unlinked and why?
What will be an ideal response?
Unlinked. The definition of linkage is when two genes do not assort independently. If crossing over
occurs between two genes every time meiosis occurs, these genes will always assort independently.
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A gram-negative diplococcus grew on 5% sheep blood agar and chocolate agar, had scant growth on MacConkey agar, and had no growth on modified Thayer-Martin (MTM) agar. The organism was identified as N. sicca. Which one of the following statements explains the discrepancy of the results obtained on the MTM agar?
a. The medium was most likely expired. b. The organism was most likely incorrectly transported. c. The organism was most likely incubated at 35°C instead of 25°C. d. No discrepancy is present. N. sicca does not grow on MTM agar.
Familial hypercholesterolemia affects approximately what paercentage of individuals?
a. 1/500 b. 1/5 c. 1/50 d. 1/1,000 e. 2/100
It is generally agreed that SSU (small subunit ribosomal RNA) analysis is a technique that is well suited to identifying species present in a given community.
Answer the following statement true (T) or false (F)
A bacterial genome is typically
A. a single linear piece of DNA. B. multiple linear pieces of DNA. C. a linear RNA molecule. D. a single circular DNA molecule. E. multiple circular DNA molecules.