The zebra danios are a new type of pet fish, marketed as Glo-Fish. The fish were produced by transferring genes from jellyfish (green and yellow fish) and corals (red fish) into regular zebra danio fish (striped blue and white normally) embryos. Which of the following statements is true about these fish? These fish have recombinant DNA They have been selectively bred. They are now photosynthetic This happens naturally in the wild.

The zebra danios are a new type of pet fish, marketed as Glo-Fish. The fish were produced by transferring genes from jellyfish (green and yellow fish) and corals (red fish) into regular zebra danio fish (striped blue and white normally) embryos. Which of the following statements is true about these fish? These fish have recombinant DNA They have been selectively bred. They are now photosynthetic This happens naturally in the wild.

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter8: The Structure, Replication, And Chromosomal Organization Of Dna

Section: Chapter Questions

Problem 6QP: Recently, scientists discovered that a rare disorder called polkadotism is caused by a bacterial...

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Neanderthal Hair Color The MCIR gene regulates pigmentation in humans (Sections 14.1 and 15.l revisited), .so loss-of-function mutations in this gene affect hair and .skin color. A person with two mutated alleles for this gene makes more of the reddish melanin than the brownish melanin, resulting in red hair and pa le skin. DNA extracted from two Neanderthal fossils contains a mutated MC1R allele that has not yet been found in humans, To see how the. Neanderthal mutation affects the function of the MC1R gene, Carles Lalueza-Fox and her team introduced the allele into cultured monkey cells (FIGURE 26.1 6). FIGURE 26.16 MC1R activity in monkey cells transgenic for an unmutated MClR gene, the Neanderthal MC1R allele or the gene for green fluorescent protein (GFP). GFP is- not related to MC1R. 2. What does this imply about the mutations effect on Neanderthal hair color?
Neanderthal Hair Color The MCIR gene regulates pigmentation in humans (Sections 14.1 and 15.l revisited), .so loss-of-function mutations in this gene affect hair and .skin color. A person with two mutated alleles for this gene makes more of the reddish melanin than the brownish melanin, resulting in red hair and pa le skin. DNA extracted from two Neanderthal fossils contains a mutated MC1R allele that has not yet been found in humans, To see how the. Neanderthal mutation affects the function of the MC1R gene, Carles Lalueza-Fox and her team introduced the allele into cultured monkey cells (FIGURE 26.1 6). FIGURE 26.16 MC1R activity in monkey cells transgenic for an unmutated MClR gene, the Neanderthal MC1R allele or the gene for green fluorescent protein (GFP). GFP is- not related to MC1R. What purpose do the cells with the gene for green fluorescent protein serve in this experiment?
Neanderthal Hair Color The MC1R gene regulates pigmentation in humans (Sections 14.1 and 15.1 revisited), so loss-of-function mutations in this gene affect hair and skin color. A person with two mutated alleles for this gene makes more of the reddish melanin than the brownish melanin, resulting in red hair and pale skin. DNA extracted from two Neanderthal fossils contains a mutated MC1R allele that has not yet been found in humans. To see how the Neanderthal mutation affects the function of the MC1R gene. Carles Lalueza-Fox and her team introduced the allele into cultured monkey cells (FIGURE 26.16). FIGURE 26.16 MC1R activity in monkey cells transgenic for an unmutated MC1R gene, the Neanderthal MC1R allele, or the gene for green fluorescent protein (GFP). GFP is not related to MC1R. 1. How did MCR1 activity in monkey cells with the mutant allele differ from that in cells with the normal allele?
Recently, scientists discovered that a rare disorder called polkadotism is caused by a bacterial strain, polkadotiae. Mice injected with this strain (P) develop polka dots on their skin. Heat-killed P bacteria and live D bacteria, a nonvirulent strain, do not produce polka dots when injected separately into mice. However, when a mixture of heat-killed P cells and live D cells were injected together, the mice developed polka dots. What process explains this result? Describe what is happening in the mouse to cause this outcome.
An interesting trait that some bacteria exhibit is resistance to beingkilled by antibiotics. For example, certain strains of bacteria areresistant to tetracycline, whereas other strains are sensitive to tetracycline.Describe an experiment you would carry out to demonstratethat tetracycline resistance is an inherited trait encoded bythe DNA of the resistant strain.
According to the endosymbiosis theory, mitochondria and chloroplasts are derived from bacteria that took up residence withineukaryotic cells. At one time, prior to being taken up by eukaryoticcells, these bacteria were free-living organisms. However, we cannot take a mitochondrion or chloroplast out of a living eukaryoticcell and get it to survive and replicate on its own. Discuss why not.
Scientists are interested in cloning an extinct animal called the gastricbrooding frog. This strange frog swallows its eggs and broods itsyoung within its stomach. So far, scientists have successfully usedcloning to make an embryo of the frog, but they have yet to raise oneto maturity. What steps might the scientists have used to clone thisextinct species? Why was it important for scientists to determinebefore the experiments that the great barred frog is a close relative tothe gastric brooding frog?
When the cloned cat Carbon Copy (CC) was born , she had black patches and white patches, but completely lacked any orange patches. The knowledgeablestudents of genetics were not surprised at this outcome.Starting with the somatic ovarian cell used as the sourceof the nucleus in the cloning process, explain how this outcomeoccurred.
In DNA-hybridization experiments on six species of plants in the genus Vicia, DNA was isolated from each of the six species, denatured by heating, and sheared into small fragments (W. Y. Chooi. 1971. Genetics 68:213–230). In one experiment, DNA from each species and from E. coli was allowed to renature. The graph shows the results of this renaturation experiment. Q. Can you explain why the E. coli DNA renatures at a much faster rate than does DNA from any of the Vicia species?
Null mutations are valuable genetic resources becausethey allow a researcher to determine what happens to anorganism in the complete absence of a particular protein. However, it is often not a trivial matter to determinewhether a mutation represents the null state of the gene.a. Geneticists sometimes use the following test forthe nullness of an allele in a diploid organism: If theabnormal phenotype seen in a homozygote for theallele is identical to that seen in a heterozygote(where one chromosome carries the allele in question and the homologous chromosome is known tobe completely deleted for the gene) then the alleleis null. What is the underlying rationale for thistest? What limitations might there be in interpreting such a result?b. Can you think of other methods to determinewhether an allele represents the null state of a particular gene?
In DNA-hybridization experiments on six species of plants in the genus Vicia, DNA was isolated from each of the six species, denatured by heating, and sheared into small fragments (W. Y. Chooi. 1971. Genetics 68:213–230). In one experiment, DNA from each species and from E. coli was allowed to renature. The graph shows the results of this renaturation experiment. Q. Notice that, for the Vicia species, the rate of renaturation is much faster in the first hour and then slows down. What might cause this initial rapid renaturation and the subsequent slowdown?
Hello, I did a Natural Transformation lab and have these questions to answer but don't really understand how all the processes difinetively work. If someone could explain this it would be greatly appreciated. Thank you Explain what happened in each quadrant of the TSA and DMA plates. Seven of these quadrants represent controls for this experiment – you should explain why each control was done, whether or not you would expect growth to appear in that quadrant and why, and what result you saw with your experiment (if you did not get the result that you anticipated, explain why not). Acinetobacter are common soil organisms. What do the results of this experiment tell you about potential problems that may be encountered with release of genetically modified organisms? (e.g. crops engineered for pest resistance)