13. Identify the numbered processes (1, 4, and 6) and structures (2, 3, and 5). · 1 6 (diploid) 2n 2 4 male (diploid) 2n female (diploid) 2n (haploid) n 4 (haploid) n
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- Q.No.1. A pollen of maize with nuclei labeled P, Q and R fertilized an embryo sac with nuclei labeled S, T, U, V, W, X, Y and Z as shown here. X V Y Synergids W P Tube nucleus Antipodals Which of the nuclei in the pollen grain would contain genetically identical sets of chromosomes? Which of the nuclei in the embryo sac would be chromosomally and genetically equivalent? Which of the nuclei in these two gametophytes will have no descendents in the mature seed?a Kemlan - Volum x O Maulina Kemlan - Perso X M Inbox (407) - kemlanm2 x G calculator - Google Sear x A Acellus: m/StudentFunctions/Interface/acellus_engine.html?ClassID=693717332 Unit 2 Exam Cell Division us m What type of cells are created during meiosis? A. diploid gametes B. haploid somatic cells C. haploid (reproductive) cells Using Alte Serve ht 2003 - 2021 Acellus Corporation. All Rights Reserved. Σ1. Meiosis practice with ascospores The life cycle of the fungus Sordaria fimicola begins in the haploid state. After two different types of strains combine, they develop a diploid nucleus. As the life cycle continues, the diploid nucleus undergoes meiosis (2 cell divisions, remember?) followed by mitosis (a trick the fungi do to make more mileage out of the mating). This produces eight haploid ascospores which are stored in a sac called an ascus. The spores line up in a way that shows these cell divisions. After the spores have matured, the sac will burst, allowing the ascospores to be released. These spores are haploid and thus begin the life cycle again. Sordaria fimicola is often used to observe crossing over because the wild type strain has black ascospores and the mutant type has tan ascospores. When a combination of the two strains go through meiosis, the location of the ascospores will directly show if crossing over has occurred. The below pictures shows a fruiting body with…
- Using diagrams, illustrate how nondisjunction can result in an aneuploid zygote.Figure 24.14 Which of the following statements is true? A dikaryotic ascus that forms in the ascocarp undergoes karyogamy, meiosis, and mitosis to form eight ascospores. A diploid ascus that forms in the ascocarp undergoes karyogamy, meiosiis, and mitosis to form eight ascospores. A haploid zygote that forms in the ascocarp undergoes karyogamy, meiosiis, and mitosis to form eight ascospores. A dikaryotic ascus that forms in the ascocarp undergoes plasmogamy, meiosis, and mitosis to form eight ascospores.Alternation of generations describes which of the following? The haploid form can be multicellular; the diploid form is unicellular The haploid form is unicellular; the diploid form can be multicellular Both the haploid and diploid forms can be multicellular Neither the haploid nor the diploid forms can be multicellular.
- How does a haplontic plant population maintain genetic diversity? Zygotes are produced by random fusion Gametes are created through meiosis Diploid spores undergo independent assortment during mitosis The zygote undergoes meiosis to generate a haploid sporophyte.Explain the steps leading to the formation of a mature male gametophyte, beginning with microsporocytes in a flowers anthers. Which structures are diploid and which haploid?104. Types of gametes formed by the plant with genotype AABbccDdee :- (1) 2 (2) 4 (3) 32 (4) 64
- 16. Which of the following statements describes a major difference between mitosis and meiosis I in a diploid organism? A) Sister chromatids separate in mitosis, while homologous pairs of chromosomes separate in meiosis I. B) Sister chromatids separate in mitosis, while homologous pairs of chromosomes separate in meiosis II. C) DNA replication takes place prior to mitosis, but not before meiosis I. D) Only meiosis I results in daughter cells that contain identical genetic information. 17. Which of the following events happens at the conclusion of meiosis I? A) Homologous chromosomes of a pair are separated from each other. B) The chromosome number per cell remains the same. C) Sister chromatids are separated. D) Four daughter cells are formed. 18. Refer to the drawings in the figure below of a single pair of homologous chromosomes as they might appear during various stages of either mitosis or meiosis, and answer the following question. Which diagram represents anaphase I of meiosis?…9) A diploid cell is preparing to undergo meiosis. Before the 'S' phase, the cell has 6 picograms (pg) of DNA in it. Answer the following: a) After the 'S' phase of the cell cycle what ploidy is the cell? How many picograms of DNA does it contain? b) After meiosis I, how many daughter cells are there total? What is the ploidy of each cell? How many picograms of DNA does each cell contain?Diploid nuclei of the ascomycota fungus Neurospora crassa contain 14 chromosomes. A single diploid cell in an ascus will eventually turn into a total of eight ascospores. What is the chromosome count in a single mature Neurospora ascospore? -28 -none of the options are correct -21 -7 -14
