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Peanuts have two types of growth behavior: runner, which grows low to the ground, and bunch, which grows upright and branched. A true-breeding line of runner peanuts is crossed to a true-breeding line of bunch peanuts. All of the F1 progeny grow as runners, so runner appears to be dominant. These F1 runner peanuts are then crossed to true-breeding bunch peanuts (NOT a self-cross) and the progeny show both phenotypes in a ratio of 3 bunch : 1 runner. Clearly one gene cannot explain this. How many genes are involved in the growth behavior phenotype, and what must the genotypes in the cross be? Assume recessive loss-of function mutations are involved.
What is potentiation and how does it pose a threat to living organisms. what responsibility does carson believe scientists have to the public.
A mutation occurs in Gene A that prevents RNA transcription from terminating where it is supposed to. Explain what affect, if any, you believe this mutation will have on.
define how prokaryotes and eukaryotes provide different. What does each category tell you about evolution; pick one from an early era and one from today or recent times.
In rats, a black-tailed mutant was discovered. When it was crossed to a pink long-tailed rat, 4 offspring were black-tailed and 3 were pink tailed. Two of these black-tailed rats were crossed and they produce 6 black tailed and 3 pink-tailed rats.
Drag the diagrams of the stages of meiosis onto the targets so that the four stages of meiosis I and the four stages of meiosis II are in the proper sequence from left to right. (Note that only one of the two daughter cells is shown for meiosis II..
Two genes combine to generate the phenotype of the comb of a rooster. The 4 possible phenotypes are walnut, rose, pea and single. Rose has an absolute requirement for the presence of the dominant allele R.
What type of promoters are found in the T-DNA that control oncogenes and opine synthesis genes? What is the basis for tumor formation in the Agrobacterium-plant? What causes the tumor to form? What products of the bacteria are needed to cause plan..
Determining the concentration of nacl that is isotonic for a plant parenchyma cell using 1.0 M nacl, water, test tubes in which to dilute a th nacl, using elodea leaves.
Histone protein H4 from pea plants and cow thymus glands contain 102 amino acids in both cases. A total of one hundred of the amino acids are identical in 2 species.
Why might people question the ethics of IVF? Why might those concerns be unfounded? List relevant facts and significant unknowns, separating subjective from objective information. Identify credible sources with at least two distinct viewpoints on ..
Show your work. State the phenotypes of the two parents of the original wild-type fly.
A farmer planted a field of BT 123 corn and wants to estimate the yield in terms of bushels per acre. He counts 35 ears in 1/1000 of an acre. He determines that each ear has about 500 kernels on average. He also knows that a bushel contains about 97,..
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