Compare and contrast mitosis and meiosis using words, diagrams or both
What will be an ideal response?
Mitosis involves a single round of nuclear division, whereas meiosis involves two rounds. They both include the same four phases: prophase, metaphase, anaphase, and telophase; meiosis involves two rounds of each phase. Both meiosis and mitosis are preceded by interphase, during which DNA replication takes place. In meiosis, the homologous chromosomes line up to form tetrads early in prophase I. This event, which does not occur in mitosis, allows crossing over of homologous chromosomes to take place. Crossing over provides the genetic recombination of meiosis. The sister chromatids separate in anaphase in mitosis. In meiosis, the homologous (non-sister) chromatids separate during anaphase I, and the sister chromatids separate during anaphase II. The end result of mitosis is two diploid nuclei with identical chromosomes, whereas the final result of meiosis is the production of four haploid nuclei that are not genetically identical.
Bloom's Taxonomy: Analysis
Section: General Characteristics of Eukaryotic Organisms
Learning Outcome: 12.3
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The phylum of organisms most closely linked to the evolution of land plants is the
(a) Chlorophyta. (b) Charophyta. (c) Phaeophyta. (d) Euglenozoa.
Of the asaccharolytic, oxidase-positive bacilli that do not grow on MacConkey agar, which one of the following organisms is generally associated with mixed infections resulting from bites or clenched-fist wounds?
a. Eikenella corrodens b. Weeksella virosa c. Pseudomonas maltophilia d. Sphingomonas paucimobilis
The epilimnion of a lake is located below the hypolimnion.
Answer the following statement true (T) or false (F)
A bacterium is found that is resistant to the antibiotic gentamicin. The bacterium was isolated in a hospital where patients were routinely given gentamicin for a variety of infections. What was the pressure that selected for this resistant population?
A) presence of gentamicin in the environment B) high mutation rate for the bacterium C) growth situation for the bacterium D) patients that did not receive the antibiotic