Biology

The observed numbers for dominant and recessive types in an F2 generation are 154 and 46. What would the expected number of individuals with a heterozygous genotype?
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Two parents are both heterozygous for the autosomal recessive allele for albinism. What is the probability that their first child will be an albino, their second child will be an albino, and their third child will have normal pigmentation in that order?
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Suppose you want to radioactively label DNA but not RNA in dividing and growing bacterial cells. What radiolabeled molecule would you add to the culture medium? Why would it selectively label DNA but not RNA?
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Which discovery is most directly related to careers in biology?A. the formation of a new space program to launch flights to MarsB. the discovery of the genes that are responsible for Alzheimers diseaseC. the unearthing of an ancient civilized community in the Pacific NorthwestD. the creation of a new synthetic material that is used in electronics manufacturing
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a) 1. If you were cross-breeding two plants whose only difference was their scent, you would be performing a ____ cross.
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COMPLETENWhich term describes the relationship in whichone organism lives inside the other one. Check thecorrect answer.o phagocytosis10 symbiosisO endosymbiosisDONE
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Which molecule is split apart during the light reactions in photosynthesis?. B. Carbon dioxidec. WaterD. Glucose
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"Founders of social psychology" Norman Triplett and Max Ringelmann both did research examining _______.A) the influence groups exert on their members.B) the impact of the presence of others on performance.C) how behaviors are shaped by perceptions.D) the impact of different leadership strategies on group performance.
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Which type of selection tends to increase genetic variation? A. Disruptive selection B. Directional selection C. Stabilizing selection
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This is a tissue that makes up most of the fleshy part of a plant.The fleshy part of the plant is shown.Which does this tissue work with to carry out transpiration?vascular and parenchyma tissuedermal and vascular tissueground and dermal tissueparenchyma and ground tissue
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Dieffenbachia plants usually grow well without fertilizer. A student wanted to see if adding liquid fertilizer would make a difference in the growth of the plant. Three plants were placed in the same type of pot with the same type of soil. Two plants received fertilizer and one plant did not. All plants received the same amount of light and water during the experiment.She watched the plants grow over a period of 30 days, only adding the same amount of water to each plant on a weekly basis.
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Compare the expected mosquito birth rates in the lowlands with the rates in the mountain regions. Explain your answer
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We are interested in determining whether plumage for the Guinea hens follow a common epistatic relationship. The observed phenotypes are dull, bright and brilliant. Which mode of inheritance would most likely explain the data below? Phenotype Dull 136 Bright 94 Brilliant 13 Total 243Select One:a. dominant/recessive epistasis b. duplicate dominant epistasis c. duplicate recessive epistasis d. duplicate genes with cumulative effect e. single recessive epistasis f. single dominant epistasis
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fungi exist as single cells or as branching networks of multicellular filaments with a very large surface area. what is the function of the filaments?
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He is best known for developing a method to classify plants and animals and established the system of binomial nomenclature. A. Charles Darwin B. Carolus Linnaeus C. Jean-Baptiste Lamarck D. Georges Cuvier
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Which statement is accurate?A. An allele is one form of a gene.B. Most alleles have many genes.C. An allele is made up of two genes.D. A gene consists of two traits.
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What group of organisms are the most important primary producers in the marine aquatic food web? How deep down in the water column can they be found?
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A horse has 64 chromosomes and a donkey has 62 chromosomes. A cross between a female horse and a male donkey produces a mule, which is usually sterile. How many chromosomes does a mule have? Can you think of any reasons for the fact that most mules are sterile?
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Which of the following is not an example of a naturally occurring greenhouse gas? methane,nitrous oxide ,chlorofluorocarbon or water vapor
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Predict how many genetically different offspring could be produced by outcrossing two 2n=4 individuals?
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How will the student need to revise the model to demonstrate a prokaryotic cell rather than a eukaryotic cell?
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Imagine that you are Gregor Mendel and you want to assure yourself that the F1 generation plants you generated from crossing true-breeding plantsactuallyare heterozygotes. You perform a testcross by mating all of your F1 smooth pea plants with plants that are homozygous recessive (wrinkled pea plants).
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When individuals of the same species are reproductively isolated, genetic differences may accumulate in sufficient number so that new species could emerge. Such an event would be an example of Group of answer choices A.equilibrium. B.macroevolution. C.microevolution. D.the founder effect.
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Which of these choices is a benefit of a circular economy?
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