BIOLOGY: CONCEPTS AND INVESTIGATIONS,
5th Edition
ISBN: 9781266382307
Author: Hoefnagels
Publisher: MCG
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Question
Chapter 8.5, Problem 4MC
Summary Introduction
To determine:
The change in chromosomes of daughter cells if centromere does not split during anaphase.
Concept introduction:
Anaphase is the phase in which the centromere splits and some spindle fibers become short as they pull the sister chromatids toward opposite poles of the cell.
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A somatic cell has 46 chromosomes aligned at metaphase. How many chromosomes are present at anaphase, immediately after the centromeres have split?
Draw and label G1 and G2 stages of interphase and each stage of mitosis (in order) for a cell that has two large and two small chromosomes, 2n=4. For unreplicated chromosome draw a line ( / ) and for replicated chromosome draw an X. Since we are focusing on the DNA, you can skip drawing the nuclear membrane or spindle fibers. For simplicity, do not indicate that the chromosomes are decondensed chromatin during interphase. Mark and label a place on one of the large chromosomes with the dominant allele of the “A” gene and put the recessive allele “a” on the other homolog. Mark and label a place on one of the small chromosomes with allele “B” and put the recessive allele “b” on the other homolog.
Diagrammatically show metaphase and telophase of mitosis
using a cell that is 2n=2 which has one metacentric chromosome
and one telocentric chromosome.
Chapter 8 Solutions
BIOLOGY: CONCEPTS AND INVESTIGATIONS,
Ch. 8.1 - Explain the roles of mitotic cell division,...Ch. 8.1 - Prob. 2MCCh. 8.2 - Prob. 1MCCh. 8.2 - Prob. 2MCCh. 8.2 - Prob. 3MCCh. 8.2 - Prob. 4MCCh. 8.3 - Which cell types divide by binary fission?Ch. 8.3 - Prob. 2MCCh. 8.4 - Prob. 1MCCh. 8.4 - Prob. 2MC
Ch. 8.5 - Prob. 1MCCh. 8.5 - Prob. 2MCCh. 8.5 - Prob. 3MCCh. 8.5 - Prob. 4MCCh. 8.5 - Distinguish between mitosis and cytokinesis.Ch. 8.6 - Prob. 1MCCh. 8.6 - Prob. 2MCCh. 8.6 - Prob. 3MCCh. 8.6 - Prob. 4MCCh. 8.6 - Prob. 5MCCh. 8.7 - Prob. 1MCCh. 8.7 - Prob. 2MCCh. 8.8 - Prob. 1MCCh. 8.8 - Prob. 2MCCh. 8 - A DNA molecule is placed in a test tube containing...Ch. 8 - Prob. 2MCQCh. 8 - Prob. 3MCQCh. 8 - Prob. 4MCQCh. 8 - Prob. 5MCQCh. 8 - Prob. 1WIOCh. 8 - Write and explain an analogy for each of these DNA...Ch. 8 - Obtain a rubber band and twist it as m any times...Ch. 8 - Sketch and describe the events that occur when a...Ch. 8 - Prob. 5WIOCh. 8 - List the ways that binary fission is similar to...Ch. 8 - Prob. 7WIOCh. 8 - Prob. 8WIOCh. 8 - Prob. 9WIOCh. 8 - Prob. 1PITCh. 8 - Prob. 2PITCh. 8 - Prob. 3PIT
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- Human somatic cells have 46 chromosomes. Are the cells different in any way from the parent cell and what is chromosome count of each of those cells once they have finished mitosis?arrow_forwardg A A Stage Barrow_forwardIdentify centromere, duplicated and unduplicated chromosomes in the following diagram.arrow_forward
- In which stage of karyokinesis of mitosis spliting of centromere and movement of daughter chromosomes towards opposite poles occurs.arrow_forwardDuring which of the following stages of interphase does the chromosomes consist of two chromatids joined at the centromere? Select one: G1 and G2 S and G2 G1 G1, G2 and Sarrow_forwardExplain Metaphase Chromosome Structure.arrow_forward
- Are the other phases of mitosis equal (or close)? Suggest a reason for any differences in the timing of mitosis phases.arrow_forwardIn meiosis, each centromere has a spindle fiber attached only to one side. In mitosis, each centromere has a spindle attached to how many sides?arrow_forwardAccording to the picture above, the cell shown is going through [Select] and is in the [Select ] stage of cell division.arrow_forward
- Why interphase is called prepering phase?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_forwardIf the S phase was eliminated from the cell cycle, the daughter cells wouldarrow_forward
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