Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 11, Problem 6RQ
Which of the following is not true in regard to crossover?
- Spindle microtubules guide the transfer of DNA across the synaptonemal complex
- Nonsister chromatids exchange genetic material
- Chiasmata are formed
- Recombination nodules mark the crossover point.
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The figure above shows a metaphase in which one chromosome is only connected to the spindle by a single kinetochore, thus the sister chromatids may not separate correctly during anaphase. which of the following statement/s is/are correct;
МЕТАРНASЕ
Centrioles at opposite end of cell
Spindle fibres attached to centromeres
46 double stranded chromosomes lined up along the metaphase plate
Diploid cell
2n =
ΑΝΑΡΗΑASE
Centrioles at opposite poles
Spindle fibres attaches to centromeres of the single stranded chromosomes
46 chromosomes get separated - 46 chromatids get pulled to each pole by spindle fibres
Diploid cell
2n =
Select true or false in for each of the following statements about synapsis and crossover.
Sister chromatids exchange genetic material. Answertruefalse
Nonsister chromatids exchange genetic material. Answer true or false
Chiasmata are formed. Answer true or false
Recombination nodules mark the crossover point. Answer true or false
X and Y chromosomes partially synapse. Answer true or false
Synapsis occurs during both mitosis and meiosis, but crossover only occurs during meiosis. Answer true or false
Crossover results in new gene combinations. Answer true or false
Chapter 11 Solutions
Biology 2e
Ch. 11 - Figure 11.9 If a mutation occurs so that a fungus...Ch. 11 - Meiosis usually produces___daughter___ cells. two...Ch. 11 - What structure is most important in forming the...Ch. 11 - At which stage of meiosis are sister chromatids...Ch. 11 - At metaphase I, homologous chromosomes are...Ch. 11 - Which of the following is not true in regard to...Ch. 11 - What phase of mitotic interphase is missing from...Ch. 11 - The part of meiosis that is similar to mitosis is...Ch. 11 - If a muscle cell of atypical organism has 32...Ch. 11 - Which statement best describes the genetic content...
Ch. 11 - The pea plants used in Mendel’s genetic...Ch. 11 - How do telophase I and telophase II differ during...Ch. 11 - What is a likely evolutionary advantage of sexual...Ch. 11 - Which type of life cycle has both a haploid and...Ch. 11 - What is the ploidy of the most conspicuous form of...Ch. 11 - A diploid, multicellular life-cycle stage that...Ch. 11 - Hydras and jellyfish both live in a freshwater...Ch. 11 - Many farmers are worried about the decreasing...Ch. 11 - Describe the process that results in the formation...Ch. 11 - Explain how the random alignment of homologous...Ch. 11 - What is the function of the fused kinetochore...Ch. 11 - In a comparison of the stages of meiosis to the...Ch. 11 - Why would an individual with a mutation that...Ch. 11 - Does crossing over occur during prophase II? From...Ch. 11 - List and briefly describe the three processes that...Ch. 11 - Animals and plants both have diploid and haploid...Ch. 11 - Explain why sexual reproduction is beneficial to a...Ch. 11 - How does the role of meiosis in gamete production...Ch. 11 - How do organisms with haploid-dominant life cycles...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- In the following diagram, designate each daughter cell as diploid (2n) or haploid (n).arrow_forwardFigure 10.6 Which of the following is the correct order of events in mitosis? Sister chromatids line up at the metaphase plate. The kinetochore becomes attached to the mitotic spindle. The nucleus reforms and the cell divides. Cohesin proteins break down and the sister chromatids separate. The kinetochore becomes attached to the mitotic spindle. Cohesin proteins break down and the sister chromatids separate. Sister chromatids line up at the metaphase plate. The nucleus reforms and the cell divides. The kinetochore becomes attached to the cohesin proteins. Sister chromatids line up at the metaphase plate. The kinetochore breaks down and the sister chromatids separate. The nucleus reforms and the cell divides. The kinetochore becomes attached to the mitotic spindle. Sister chromatids line up at the metaphase plate. Cohesin proteins break down and the sister chromatids separate. The nucleus reforms and the cell divides.arrow_forwardWhich of the following statements applies to non-sister chromatids? they are genetically identical they segregate from each other at anaphase of mitosis they contain the same genes in the same order but may have different alleles they are attached to each other at the centromerearrow_forward
- Centrioles at opposite end of cell Spindle fibres attached to centromeres 46 double stranded chromosomes lined up along the metaphase plate Diploid cell 2n = ANAPHASE Centrioles at opposite poles Spindle fibres attaches to centromeres of the single stranded chromosomes 46 chromosomes get separated - 46 chromatids get pulled to each pole by spindle fibres Diploid cell 2n =arrow_forwardWhich of the following statements are true regarding mitosis in humans? 23 pairs of homologous chromosomes are separated four haploid gametes are produced in males 46 pairs of homologous chromosomes are separated two genetically identical daughter cells are produced 23 pairs of sister chromatids are separated 46pairs of sister chromatids are separated 1 haploid gamete and 2 polar bodies are produced in femalesarrow_forwardChoose the phase of meiosis in column 2 that best matches each event in column 1. one haploid set of replicated chromosomes at each spindle pole genetic recombination events take place shortest stage aligning of bivalents in the center of a spindle one haploid set of unreplicated chromosomes at each spindle pole aligning of monovalents in the…arrow_forward
- Which of the following statements applies to homologous chromatids? -they are attached to the same centromere -they are genetically identical -they segregate from each other at anaphase of mitosis -they contain the same genes in the same order but have different alleles of some genes -more than one statement applies to homologous chromatidsarrow_forwardChromosome structure is composed of the following Telomere Centromere Chromatids O All of the abovearrow_forwardWhich of the following statements applies to homologous non-sister chromatids? They contain the same genes in the same order but may have different alleles of some genes. They are genetically identical. They segregate from each other at anaphase of mitosis. They are attached to the same centromere. More than one statement applies to homologous chromatids.arrow_forward
- Can be more than one answer: Select all of the following that are true of MEIOSIS but not of MITOSIS. a) cell division occurs during cytokinesis b) results in two identical daughter cells c) halves the number of chromosomes in a cell d) spindle fibers contract during anaphase e) tetrads line up on metaphase platearrow_forwardIn Coleus , the somatic cells are diploid with 24 chromosomes. How many of each of the following is present in each cell at the stage of mitosis and meiosis indicated below? kinetochore at prophase chromosomes at anaphase chromatids at metaphase 1 chromosomes at telophase after cytokinesis centromeres at anaphase chromosomes at telophase II after cytokinesis centromere at anaphase I chromatids at metaphasearrow_forwardDuring meiosis, homologous sets of four chromatids are lined up along the cell's equator, attached to spindle fibers. Which of the following processes will happen next? Top of Form Anaphase I Telophase II Prophase I Metaphase IIarrow_forward
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