Biological Science (7th Edition)
7th Edition
ISBN: 9780134678320
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Chapter 12, Problem 10TYPSS
Summary Introduction
To review:
When a fruit fly embryo first begins to develop, a large cell is generated that contains over 8,000 genetically identical nuclei. Explain the reason responsible for this result.
Introduction:
Cell cycle is the sequence of events that occurs in the cell for replication and division of chromosomes to produce two identical daughter cells with equally divided genetic material. Cytokinesis is a part of cell division where cytoplasm of the cell is divided into two daughter cells.
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3)
At the completion of meiosis, how many sets of chromosomes does each daughter cell contain?
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4)
Imagine that a cell within a tissue is expressing a protein that leaves the cell and can “signal” to other cells. Which cells will respond?
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Cells that are within range of the signaling molecule and have protein receptor that binds the signaling molecule
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Cells that are within range of the signaling molecule
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Cells that are within range of the signaling molecule and are the same type of cell
Suppose the diagram below shows a cell during metaphase Meiosis II:
microtubule
a) Label the elements of the figure.
b) Assuming all of the chromosomes present during Meiosis II are shown in the figure
above, how many chromosomes (counting homologous pairs as two chromosomes
a cell from this organism have immediately after fertilization?
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The diagram below shows a cell during Meiosis II:
a) What phase of Meiosis II is the cell in? How do you know?
b) Assuming all of the chromosomes present during Meiosis II are shown in the figure above, how many chromosomes (counting homologous pairs as two chromosomes) does a gamete from this organism have?
c) Draw the same cell during the same phase of Meiosis I. Label the elements
Chapter 12 Solutions
Biological Science (7th Edition)
Ch. 12 - 1. Which statement about the daughter cells...Ch. 12 - After S phase, what comprises a single chromosome?...Ch. 12 - Progression through the cell cycle is regulated by...Ch. 12 - 4. What major events occur during anaphase of...Ch. 12 - 5. Identify at least two events in the cell cycle...Ch. 12 - 6. What evidence suggests that during anaphase,...Ch. 12 - 7. Evaluate each of the following defects. Which...Ch. 12 - Prob. 8TYUCh. 12 - Prob. 9TYPSSCh. 12 - Prob. 10TYPSS
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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
- A typical somatic cell from a badger, which is a diploid, sexually reproducing animal, contains a total of 32 chromosomes. Gametogenesis in badgers is similar to humans. What is the genome size for the badger in terms of chromosome number? How many DNA molecules would be found in a secondary oocyte before dividing? How many chromosomes would be found in a cell at metaphase? How many DNA molecules should be in a tetraploid liver cell from the badger?arrow_forwardWhat is the major difference between mitosis and meiosis I in a diploid organism? A) Sister chromatids separate in mitosis; homologous pairs of chromosomes separate in meiosis I. B) Sister chromatids separate in mitosis; 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.arrow_forwardHuman cells normally have 46 chromosomes. For each of the following stages, state the number of chromosomes present in the particular cell.a) metaphase of mitosisb) metaphase I of meiosis c) telophase of mitosisd) telophase I of meiosis e) telophase II of meiosis (Remember that a pair of attached chromatids count as one chromosome.)arrow_forward
- One reason that worker bees forgo their own reproduction to help their sister (the queen) reproduce is that female bees are more closely related to their sisters than they are to their own offspring. This quirk of genetics results from the fact that bees have haplodiploid sex determination, in which females are diploid, with a mother and a father, but males are haploid, developing from unfertilized eggs. Because males are haploid, they produce sperm by mitosis. Explainwhy haplodiploid sex determination causes females to be more closely related to their sisters than to their offspring.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_forward1). A diploid somatic cell from a dog (Canis lupus familiaris) has a total of 78 chromosomes (2n = 78). As in humans, sex chromosomes determine sex: XX in females and XY in males. a) What is the total number of DNA molecules in G2 of the cell cycle? b) What is the total number of sister chromatids during prometaphase? c) What is the total number of telomeres in a somatic dog cell in G1? d) What is the total number of autosomes?arrow_forward
- Which of the following are differences between mitosis and meiosis I? CHOOSE ALL THAT APPLY. A) Crossing over occurs during meiosis I but not during mitosis B) DNA replication takes place prior to mitosis, but not before meiosis I C) Sister chromatids separate in mitosis, and homologs separate in meiosis I D) Only meiosis I results in daughter cells that contain identical genetic information E) Meiosis I results in two daughter cells, while mitosis results in four daughter cellsarrow_forwardimagine a giraffe whose diploid is 30. A) what # of chromosomes will be present in a somatic cell at prophase of mitosis? B) what will be the # of chromosomes present in a somatic cell at prophase 2 of meiosis?arrow_forwardThe developing egg cell of a plant with a diploid chromosome number 20 was treated with colchicine. A normal sperm cell subsequently fertilized this egg. How many chromosomes would you expect to find in the zygote? Explain.arrow_forward
- 44) Pick the answer that best describes how metaphase I and metaphase II differ from each other. A) Metaphase I lines up homologous chromosomes on the metaphase plate while metaphase II lines up sister chromatids. B) Metaphase I is a haploid stage while metaphase II is a diploid stage C) Metaphase I lines up sister chromatids on the metaphase plate while metaphase II lines up homologous chromosomes. D) Metaphase I is a diploid stage while metaphase II is a haploid stage E) A&Darrow_forwardIn a turtle species, a diploid cell in the G1 phase of the cell cycle contains 22 picograms of DNA (picogram is a measure of the total mass of the DNA present). How much DNA is present in a cell of the same species at prophase II of meiosis (prophase of the second meiotic division)?arrow_forwardQ1: Prior to going through meiosis, the nucleus would look like which letter? (Write just the letter below.) Q2: Next, the mitotic spindle fibers start to organize into centrosomes and these centrosomes pull away from each other, but since these images just show the nucleus, you don't see that here. While the mitotic spindle fibers are reorganizing, the DNA chromosomes start to condense, which you do see here. This is represented by what image? Q3: Once the DNA is completely condensed and organized into chromosomes, homologous chromosomes pair up in a process known as synapsis. This is represented by what image? Q4: Synapsis sets the homologous chromosomes up for crossing over when homologous chromosomes exchange parts of their DNA with each other. This is represented by what image Q5: At this point, the nuclear envelope is completely dissolved and no longer visible. The homologous chromosomes are lined up in the middle by the mitotic spindle fibers. This happens as the mitotic…arrow_forward
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