List four base triplets that are clearly responsible for punctuation (initiation, termination)
What will be an ideal response?
AUG (rarely GUG) for initiation; UAA, UGA, and UAG for termination
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Which process(es) can generate recombinant gametes? (Select all that apply.)
A) crossing-over between two linked heterozygous loci B) independent assortment of two unlinked heterozygous loci C) segregation of alleles in a homozygote D) crossing-over between two linked homozygous loci
Which situation describes potential observer bias in an experimental process?
A) Dr. Jones is evaluating cancer patients for their responses to a new therapeutic drug. She knows which patients are receiving the placebo and which are receiving the drug. B) Mr. Bromley is conducting a survey of weight loss for his professor. He asks each student in the study the same questions. C) Ms. Bradley is an outside consultant who is conducting a health and wellness survey for a pharmaceutical company. She does not know the name of the company nor does she know the name of the drug being tested during the survey. D) Dr. Postgate is analyzing biopsy samples from rats that have been given either a placebo or an experimental drug believed to reduce inflammation. Each sample is identified by a code number so that Dr. Postgate cannot tell which treatment the rats received.
Which classification grouping includes the greatest number of species?
A) Domain B) Order C) Phylum D) Kingdom
A field of wildflowers contains approximately equal numbers of red, yellow, and white flowers. A fire moves through the field and kills most of the red and yellow flowers, but leaves a small population of white flowers undisturbed. The following year, most of the flowers that grow in the field are white. Which process has resulted in the random change in the genetic makeup of the flower population?
A) gene flow B) stabilizing selection C) genetic drift D) directional selection