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Meiosis is duplication-division-division. Could a cell that underwent asexual reproduction by normal mitosis also undergo a variation of sexual reproduction, producing gametes by halving its chromosomal number by simply dividing once (without chromosomal duplication), rather than first duplicating and then dividing twice? Would this decrease the variation advantages of sex?
What is the basic theory of biological evolution and what evidence is there to support this theory? Describe the two scientific models for evolution.
Both eye color and leg length are inherited in a dominant-recessive fashion in fruit flies. Fruit fly wings can either be wildtype (P), or have purple eyes (p), and either wildtype (S) or have short legs (s).
Suppose that a molecular clock has been operating since the divergence of two species, calculate the divergence rate, given that the amino acid difference is 20 percent.
Virtually all sulfur-reducing members of Enterbacteriaceae are motile. Suppose for a moment that you inoculate a SIM medium with an inole-producing sulfur reducer that is non motile. After completing all aspects of the test, what would you expect ..
Eukaryotic cells may divide through the process of mitosis or meiosis. In humans, mitosis generates new cells for growth and repair.
what type of channel is on the axon hillock of a postsynaptic cell? A. ligand gated B. voltage gated Na+, K+ C. voltage gated Na+, K+, Ca2+ D. none
Do you think that a prenatal test is worthwhile if it detects a genotype, but cannot predict the phenotype? Discuss the risk/benefit issues of this situation.
what type of channel is in a presynaptic membrane in a presynaptic cell? A. ligand gated B. voltage gated Na+, K+ C. voltage gated Na+, K+, Ca2+.
Viruses use the host cell machinery to replicate. However, some viruses replicate their genomes by a mechanism that host cell cannot support.
Compare and contrast the atmospheres of Jovian planets and the atmospheres of terrestrial planets. Why are the components of Jovian atmospheres so different from those of terrestrial planets?
In a species of plant, two genes control flower color. The red allele is dominant to the white allele; the color producing allele is dominant to the non-color producing allele.
The mass of an empty Erlenmeyer flask and stopper was determined to be 52.06 grams. When filled with distilled water, the mass was 303.0 grams.
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