Sheree is referred to a genetic counselor because a cystic fibrosis (CF) test done as a routine part of her prenatal care indicated that she is a carrier of the most common mutant allele. Sheree is stunned, because no one in her family has the disease. She is 26 years old. The genetic counselor would most likely
A) explain autosomal recessive inheritance and suggest that Sheree's husband be tested for CF.
B) explain autosomal dominant inheritance and suggest that Sheree's husband be tested for CF.
C) explain autosomal recessive inheritance and suggest that Sheree's parents be tested for CF.
D) advise Sheree to have amniocentesis to check the fetus for the CF genotype.
A) explain autosomal recessive inheritance and suggest that Sheree's husband be tested for CF.
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Which of the following groups of Archaeplastids have features more closely related to the ancestral cyanobacterial endosymbiont than any other algae?
A. red algae B. green algae C. viridoplantae D. glaucocystophytes E. streptophyte algae
Trophic-level transfer efficiency averages about
A. 1%. B. 25%. C. 33%. D. 10%. E. 0.1%.
It is sometimes jokingly said that you could study for your biology test by placing your textbook under your pillow at night and thereby learn by osmosis, as the knowledge would flow from the book to your brain while you slept
Aside from the obvious absurdity of this claim, what is wrong with the use of the word "osmosis" in this context? How might you lose knowledge (if knowledge could actually flow along a concentration gradient between a book and a brain) if you tried this technique?
Which of the following techniques reveal(s) the presence of fungal cells in tissues?
A) Gram staining B) KOH treatment C) Gomori methenamine silver (GMS) staining D) Gram staining combined with KOH treatment E) both KOH treatment and Gomori methenamine silver (GMS) staining