What is the name of a normal gene that serves to promote cellular division?
What will be an ideal response?
proto-oncogene
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If Hadley cell circulation were the only force that planetary governed rainfall patterns, where should the rainier places on earth be found?
A) near the equator because of the intense solar input. B) at 30°N and S latitude. C) at 60°N and S latitude. D) along mountain ranges. E) A and C.
Comparing reabsorption and secretion in the nephron, which of the following statements is TRUE?
A. secretion occurs when materials in the lumen of the tubules reenter the blood B. secretion occurs when materials leave the blood at the glomerulus C. reabsorption occurs when materials from the blood reenter the tubules D. reabsorption occurs when materials in the tubules renter the blood vessels. E. reabsorption occurs when materials in the interstitial spaces around the tubules enters the lumen of the tubules.
Assume that a dihybrid F2 ratio, resulting from epistasis, was 9:3:4. If a double heterozygote was crossed with the fully recessive type, what phenotypic ratio is expected among the offspring?
A) 1:2:1 B) 1:1:1 C) 12: 3: 1 D) 9:3:4 E) 1:1:2
Which of the following is a major contributor to variation in gene density in eukaryotes?
A) restriction sites B) transposons C) repetitive sequences D) heterochromatin