Loose-leaf Version for What Is Life? A Guide to Biology 4E & LaunchPad for What is Life? A Guide to Biology 4E (Twelve Month Access)
4th Edition
ISBN: 9781319154639
Author: Jay Phelan
Publisher: W.H. Freeman & Co
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Chapter 8, Problem 4MC
Summary Introduction
Introduction:
DNA is prominently visible only when it is in the form of chromosomes.
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Students have asked these similar questions
1) What phase of mitosis is this?
Answer:
2) What is the indicated structure 1? select one.
a. chromosome
b. chromosome with two sister chromatids
c. centrioles/centrosome
d. spindle fibres
e. metaphase plate
3)If the diploid (2n) number of this cell is 8 how many chromosomes are present?
4) If the diploid (2n) number of this cell is 8 how many sister chromatids are present?
5) If the diploid (2n) number of this cell is 8 how many homologous pairs are present?
Which of the following statements is FALSE?
A.
Centrosomes are anchor points for microtubules and are essential to form the mitotic spindle.
B.
In the eukaryotic cell cycle the cell spends much more time in the interphase than in the mitotic phase.
C.
In telophase two nuclear envelopes are fully formed and the cell splits in two via cytokinesis.
D.
The contraction of the kinetochore microtubules leads to the separation of the sister chromatids during anaphase.
E.
In the prophase chromatin condenses into X-shaped chromosomes.
With regard to the process of mitosis, which of the following pairs is NOT matched correctly?
a. Interphase - the cell grows, chromosomes replicate, and proteins are produced to prepare the
cell to divide
Ob. Prophase - chromosomes condense, and the nuclear membrane dissociates/breaks down
c. Metaphase - chromosomes move toward opposite poles (or sides) of the cell
d. Anaphase - sister chromatids separate
e. Telophase - two distinct nuclei are formed; this is the stage immediately before cytokinesis
O O O
Chapter 8 Solutions
Loose-leaf Version for What Is Life? A Guide to Biology 4E & LaunchPad for What is Life? A Guide to Biology 4E (Twelve Month Access)
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- Asaparrow_forwardIn cell division, each chromosome is copied entirely. a.) true b.) falsearrow_forwardA cell is shown during the anaphase stage of mitosis. Which of the following statements best explains what would be different if the diagram showed anaphase I of meiosis instead of anaphase of mitosis? Select one: a. Homologous chromosomes would be moving to the same end of the cell. b. Homologous chromosomes would form a tetrad. c. Each chromosome would have two sister chromatids. d. The sister chromatids would be pulled apart.arrow_forward
- In a cell cycle Select one: a. DNA is replicated and passed to homologous chromosomes during interphase b. DNA is replicated and passed to daughter cells during mitotic phase c. DNA and RNA are replicated and passed to parent cells during interphase d. DNA and RNA are replicated and passed to sister chromatids during mitotic phasearrow_forwardUsing the symbols above: 1. Given: Adult diploid cell (2n = 8) 2. Show the condition of the chromosomes in the following Mitosis phases (illustrate): a. prophase b. metaphase c. anaphase d. telophase/cytokinesisarrow_forwardwhich of the following is not true about mitosis? a.) chromosomes line up in metaphase by connecting to kinetechore proteins b.) the process starts out as a diploid cell c.) dna replicates in M phase d.) cells can be 4n if cytokenisis does not occur at the endarrow_forward
- A parent cell divides to form two genetically identical daughter cells in the process of mitosis. For mitosis to take place: A. the parent cell must divide its DNA in half so each daughter cell gets only the genes needed to carry out its functions. In this way, differentiation occurs. B. the parent cell must reproduce its DNA during telophase C. the parent cell must first be fertilized D. the parent cell must replicate its entire genome prior to mitosis E. crossover must be delayed until the second cell divisionarrow_forwardMatch the stage of mitosis with the correct description. a.Microtubles that are attached to each chromosome shorten, pulling the sister chromatids apart. b.The chromosomes line up single file in the middle of the cell. Sister chromatids are clearly visible in this stage. c.The chromosomes that were pulled apart reach therir respective poles. The chromosomes decondense. The nuclear envelope re-forms. The cytoplasm with organelles divides. d.Chromosomes have replicated and appear as an "X". The nuclear envelope begins to break down. The chromosomes begin to condense into individual structures. e.Centrosomes move to the opposite ends of the cell and establish two spindle poles.The nuclear envelope is completely degraded by the end of this stage. The chromosomes are completely consensed by the end of this stage. f.Not actually part of mitosis; this stage is the part of the cell cycle that is not the mitotic phase. DNA is decondensed and appears diffuse throughout the…arrow_forward1) Examine the picture of an onion root tip with cells in various stages of the cell cycle. A student claims that interphase is the longest stage of the cell cycle. Another student claims that mitosis is the longest stage. Using evidence from the photo, determine which student is correct and why. A) Mitosis is the longest stage because anaphase requires more time to separate chromatids. B) Interphase is the longest stage because chromosomes are visible in the majority of the cells. C) Mitosis is the longest stage because the majority of the cells in the photo are replicating their DNA. D) Interphase is the longest stage because the majority of the cells in the photo have uncondensed chromatin and are not dividing. Not Gradedarrow_forward
- A bivalent consists of: A Two chromatids and one centromere B Four chromatids and two centromeres C Two chromatids and two centromeres D Four chromatids and four centromeresarrow_forwardWhich of the following statements correctly describes the process of mitosis in a diploid cell?Note: a complete set of chromosomes refers to one of each kind of chromosome. A complete set of homologous chromosomes refers to two of each kind of chromosome - one from the mother and one from the father) Select one: a. A complete set of homologous chromosomes are divided into each daughter cell so that each new cell gets one set of chromosomes. b. Cytoplasm and its organelles are equally divided into each daughter cell. c. A complete set of homologous chromosomes are equally divided into each reproductive cell. d. DNA and cytoplasm are equally divided into each daughter cell.arrow_forwardThe same chromosome can look very different depending on when in meiosis it is observed. Explain fully why this is so and also why the chromosome is less condensed during some parts of the cell cycle? How many DNA molecules does each chromosome contain at the beginning of Prophase I? Use the following terms in your explanation: chromatin, histone, chromatid, centromere.arrow_forward
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