Prophase IV. Immediately after the meal, the blood glucose level will increase, and then insulin will be secreted to counter the increase. Which of the following crosses would produce offspring in the ratio of 1 red : 2 roan : 1 white. D) All of the genes controlling the traits behaved as if they were on different chromosomes. Which of the following best describes the role of cell-to-cell communication during a response to an invasion of antigens? Based on the data, the percent of mitotic cells that were in metaphase is closest to which of the following? D) haploid, and the chromosomes are each composed of two chromatids. D) that the parents were both heterozygous. C) traits can be dominant or recessive, and the recessive traits were obscured by the dominant ones in the F1. The rate of glycogen synthesis in the cell will increase. Short tails (T) are dominant to long tails (t). Which of the following outcomes will most likely result from the inactivation of the Beta-2 adregonic receptor? Which of the following justifies the claim that differences in the components of cell signaling pathways explain the different responses to epinephrine? A cross between a red-flowered plant and a white-flowered plant yields all-purple offspring. The karyotype of one species of primate has 48 chromosomes. The following questions refer to the essential steps in meiosis described below. The part of the radish we eat may be oval or long, with long being the dominant characteristic. What is the difference between a monohybrid cross and a dihybrid cross? How does the sexual life cycle increase the genetic variation in a species? A triploid cell contains three sets of chromosomes. Which of the following most accurately describes an observation and an effect of the viral infection indicated in table 1? It is the world's most widely consumed psychoactive drug. The flower color trait in radishes is an example of which of the following? A) By allowing independent assortment of chromosomes, Independent assortment of chromosomes is a result of. We extended the deadline for final digital submission of AP Art and Design portfolios and AP Computer Science Principles (CSP), AP Seminar, and AP Research performance tasks to Thursday, May 20, 2021, 11:59 p.m. EDT. A) one phenotype was completely dominant over another. Which of the following describes a critical role of the cAMP during the transduction stage of a G protein signal transduction pathway? Mendel's second law of independent assortment has its basis in which of the following events of meiosis I? The fact that all seven of the pea plant traits studied by Mendel obeyed the principle of independent assortment most probably indicates which of the following? Prophase IIII. E) Asexual reproduction is utilized only by fungi and protists, whereas sexual reproduction is utilized only by plants and animals. B) parental traits that were not observed in the F1 reappeared in the F2. An experiment showed that a mutation in the Ced-9 gene led to excessive cell death in C. elegans. Mendel accounted for the observation that traits which had disappeared in the F1 generation reappeared in the F2 generation by proposing that. Cell signaling depends on the ability to detect a signal molecule. Discover new music on MTV. Metaphase IIIII. Mendel's observation of the segregation of alleles in gamete formation has its basis in which of the following phases of cell division? A dwarf, red snapdragon is crossed with a plant homozygous for tallness and white flowers. Which of the following about the law of segregation is false? C) A dihybrid cross involves organisms that are heterozygous for two characters and a monohybrid only one. Anaphase IIIV. In snapdragons, heterozygotes for one of the genes have pink flowers, whereas homozygotes have red or white flowers. If a heterozygous plant is crossed with a homozygous tall plant, what is the probability that the offspring will be short? E) His experiments with the breeding of plants such as peas. the storage of GLUT4 in vesicles inside the cell will increase. Tallness (T) in snapdragons is dominant to dwarfness (t), while red (R) flower color is dominant to white (r). Get the latest music news, watch video clips from music shows, events, and exclusive performances from your favorite artists. Its genotype is HhTt. Section I is multiple choice and Section II is free response. What fraction of the progeny of the cross BbTt à BBtt will have black fur and long tails? Not all cells have receptors for epinephrine. Factor X will not be activated, which will prevent thrombin from forming. Chromatids are separated from each other. Beginning in early March, AP coordinators will be able to assign students to Administration 2 and/or 3 exams, if needed. We can therefore conclude which of the following? What proportion of the progeny will be expected to phenotypically resemble the first parent? The output of each program is a set of HTML commands, which is rendered by your web browser as a standard web page. ... Unit 5: Heredity ... Once you join your AP class section online, youâll be able to access AP Daily videos, any assignments from your teacher, and your personal progress dashboard in AP Classroom. Based on figure 1, which of the following statements correctly links a stage of the cell cycle with the event occurring at that stage? The genes for flower color and location assort independently. Telophase II. Black fur in mice (B) is dominant to brown fur (b). Which of the following genotypes is possible in a gamete from this organism? Which of the following statements is consistent with the data in figure 1? After telophase I of meiosis, the chromosomal makeup of each daughter cell is. It looks like your browser needs an update. Two true-breeding stocks of pea plants are crossed. Radish flowers may be red, purple, or white. When plants with red flowers are crossed with plants with white flowers, what proportion of the offspring will have pink flowers? Two characters that appear in a 9:3:3:1 ratio in the F2 generation should have which of the following properties? Which statement provides the evidence to justify the claim that signal transduction may result in an altered pathway? Which of the following will most likely result from a loss of P53 function? The AP Biology test is divided into two sections. more cells are produced per unit of time in the root tips growing in compact sand than the root tips growing in loose sand. Oh no! Which of the following changes in the FGFR signaling pathway is most likely to result in uncontrolled cell proliferation? Unlike many other psychoactive substances, it is legal and unregulated in nearly all parts of the world. Telophase I VIII. In certain plants, tall is dominant to short. D) peas have an unusually long generation time. Based on the sample means, which of the following conclusions about the cells in the growing root tips of zea mays seedlings is best supported by the results of the experiment? Caffeine is a central nervous system (CNS) stimulant of the methylxanthine class. Learn vocabulary, terms, and more with flashcards, games, and other study tools. In a cross AaBbCc à AaBbCc, what is the probability of producing the genotype AABBCC? Increased cell division will lead to the formation of a tumor. Negative feedback regulation does not occur, so the enzyme will be active when glycolysis is not needed. In cattle, roan coat color (mixed red and white hairs) occurs in the heterozygous (Rr) offspring of red (RR) and white (rr) homozygotes. cAMP results in the activation of an enzyme that amplifies the signal by acting on many substrate molecules. Which of the following statements best predicts the effect of a loss of function of the insulin receptor's intracellular domain? Only cells with such receptors are capable of responding. To ensure the best experience, please update your browser. The test was to be conducted during the day-shift of 25 April 1986 as part of a scheduled reactor shut down. If 1,000 F2 offspring resulted from the cross, approximately how many of them would you expect to have red, terminal flowers? D) A display of every pair of homologous chromosomes within a cell, organized according to size and shape. If a cell of a usually diploid species with 42 chromosomes per cell is triploid, this cell would be expected to have which of the following? which of the following best predicts what will happen to the blood glucose levels if the person has another meal after 5 pm? Metaphase I VI. Mendel was able to draw his ideas of segregation and independent assortment because of the influence of which of the following? What typically occurs first once a chemical messenger reaches a target cell? Based on table 1, what percent of the life cycle of yeast cells is spent in DNA replication? 7) Two plants are crossed, resulting in offspring with a 3:1 ratio for a particular trait. The Pre-AP Biology course emphasizes the integration of content with science practicesâpowerful reasoning tools that support students in analyzing the natural world around them. Which of the following occurs in meiosis but not in mitosis? A sexually reproducing animal has two unlinked genes, one for head shape (H) and one for tail length (T). Which of the following best predicts the effect of a mutation that causes EGFR to be active in the absence of a growth factor? The hormone is released into the bloodstream where it can be transported to all cells with the correct receptors. AP Biology Exam. AP Bio: IST (BI), ISTâ1 (EU), ISTâ2 (EU) AP®ï¸/College Biology. Which of the following is true of a species that has a chromosome number of 2n = 16? The virus stimulates frequent cell division. When crossing an organism that is homozygous recessive for a single trait with a heterozygote, what is the chance of producing an offspring with the homozygous recessive phenotype? B) The genes controlling the characters obey the law of independent assortment. Which of the following best describes the component that metaformin represents the signal transduction pathway that regulates glucose production in the liver? If the SRY gene is absent or nonfunctional, the embryo will exhibit female sexual development. Legend (Opens a modal) Possible mastery points. Which of the following best predicts the effect of the mutation? Synthesis of sufficient DNA for two daughter cells occurs in stage II. Designing experiments and procedures to test a prediction or theory. It looks like your browser needs an update. 6) How many unique gametes could be produced through independent assortment by an individual with the genotype AaBbCCDdEE? A cross between homozygous purple-flowered and homozygous white-flowered pea plants results in offspring with purple flowers. B) The statement is true for meiosis I only. A researcher found a mutation that resulted in the PFK enzyme being unable to bind ATP to the allosteric site. B) Traits are inherited in discrete units, and are not the results of "blending.". Collecting and analyzing data. Chiasmata are what we see under a microscope that let us know which of the following is occurring? B) The statement is true for meiosis I only..; Homologous chromosomes synapse and crossing over occurs. There is a change from 3 to 6 picograms of DNA because DNA is replicated before each round of cell division. Start studying Unit 5 AP Bio Multiple Choice. D) include genes that determine an individual's sex. You have 90 minutes to complete each section, and each section will account for half of your grade. There are not enough nucleotides available to construct DNA. How many different types of gametes would be possible in this system? E) It is a method that can be used to determine the number of chromosomes in a plant. E) The statement is true for mitosis and meiosis II. Pre-AP Biology sparks student motivation and critical thinking about our living world as they engage in real-world data analysis and problem solving. What was the most significant conclusion that Gregor Mendel drew from his experiments with pea plants? Biology is brought to you with support from the. Part A of Section I consists of 63 multiple choice questions. The most probable source of this error would be a mistake in which of the following? Which of the following statements best justifies the claim that changes in the expression of ced-9 in C. elegans can affect regulation of apoptosis in the cell? ... Start Unit test. In a particular female, cell division goes awry and she produces one of her eggs with an extra chromosome (25). D) At sexual maturity, ovaries and testes produce diploid gametes by meiosis. Independent assortment of chromosomes occurs. This demonstrates, The F1 offspring of Mendel's classic pea cross always looked like one of the two parental varieties because. Oh no! For the following questions, match the key event of meiosis with the stages listed below.I. Which of the following statements best describes a primary function of plasmodesmata? Anaphase I VII. Which statement best predicts why a cell's progression through the cell cycle might be halted by the G1/S checkpoint? They allow the movement of molecules from one cell to another, enabling communication between cells. 75% of the virus infected cells are found in mitosis. Chemicals are secreted from antigen-presenting cells that then activate helper T-cells. It is a ligand that activates the signal transduction pathway of the activation of AMPK. The heterozygous condition results in pink (Rr) flower color. Start studying AP Bio Unit 4. Scheduled maintenance: Saturday, December 12 from 3â4 PM PST Learn vocabulary, terms, and more with flashcards, games, and other study tools. Unit: Gene expression and regulation. To ensure the best experience, please update your browser. Which of the following best explains a possible mechanism that would enable the hormone to efficiently reach all of the target cells in the body? the irreversible association of FGFR proteins. The Sequence Manipulation Suite is a collection of web-based programs for analyzing and formatting DNA and protein sequences. 25) Given the parents AABBCc à AabbCc, assume simple dominance and independent assortment. One parent has red, axial flowers and the other has white, terminal flowers; all F1 individuals have red, axial flowers. Skin color in a certain species of fish is inherited via a single gene with four different alleles. A) All +bt +vg heterozygotes. Biology is brought to you with support from the Amgen Foundation. Asexual reproduction and sexual reproduction differ in all but which of the following ways? It was important that Mendel examined not just the F1 generation in his breeding experiments, but the F2 generation as well, because. A given organism has 46 chromosomes in its karyotype. A 1:2:1 phenotypic ratio in the F2 generation of a monohybrid cross is a sign of. What are the genotype and phenotype of the F1 individuals? The day shift crew had been instructed in advance on the reactor operating conditions to run the test and in addition, a special team of electrical engineers was present to conduct the one-minute test of the new voltage regulating system once the correct conditions had been reached. Which of the following happens at the conclusion of meiosis I? If a homozygous bent wing fly is mated with a homozygous vestigial wing fly, which of the following offspring would you expect? A cell divides to produce two daughter cells that are genetically different. Drosophila (fruit flies) usually have long wings (+) but mutations in two different genes can result in bent wings (bt) or vestigial wings (vg). 0. This suggests. In animals, meiosis results in gametes, and fertilization results in. A) the random and independent way in which each pair of homologous chromosomes lines up at the metaphase plate during meiosis I. Pea plants were particularly well suited for use in Mendel's breeding experiments for all of the following reasons except that. Get the latest science news and technology news, read tech reviews and more at ABC News. New AP Course Pacing Guide This pacing guide (.pdf/156.44 KB), designed for classrooms that have only completed approximately 25% of typical course content by January, can help students develop their knowledge and skills by May. Based on the model, which of the following best predicts the effects of warfarin on a patient?
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