Becker's World of the Cell (9th Edition)
9th Edition
ISBN: 9780321934925
Author: Jeff Hardin, Gregory Paul Bertoni
Publisher: PEARSON
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Chapter 25, Problem 25.5PS
More about DNA. Let X be the amount of DNA present in the gamete of an organism that has a diploid chromosome number of 4. Assuming all chromosomes to be of approximately the same size, how much DNA (X, 2X, 1/2X, and so on) would you expect in each of the following?
- (a) A zygote immediately after fertilization
- (b) A single sister chromatid
- (c) A daughter cell following mitosis
- (d) A single chromosome following mitosis
- (e) A nucleus in mitotic prophase
- (f) The cell during metaphase II of meiosis
- (g) One bivalent
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Let’s model mitosis. Focus on drawing the cell nucleus taking care to model the number and location of chromosomes. Although the chromosomes are only visible in each stage, draw them in all stages for clarity sake.
Draw a 2n=4 cell at G1 of interphase.
Draw the same cell at the start of prophase.
Draw the same cell at metaphase.
Draw the cell(s) that result at the end of cytokinesis.
You can draw this out on paper
MODIFIED TRUE OR FALSE. In the following items, read each statement carefully. I. Mitosis and meiosis are two cellular process that might be quite similar in terms of stages, but technically, different process that have two different functions. II. As an example, mitosis involves the production of genetically different daughter cells whereas meiosis involves the production of genetically identical daughter cells.
a. The first statement (I) is correct and the second statement (II) is wrong
b. The first statement (I) is wrong and the second statement (II) is correct
c. Both statements are correct
d. Both statements are wrong
I. The continuity of life from one cell to another has its foundation in the reproduction of cells by way of the cell cycle.II. The cell cycle is an orderly sequence of events in the life of a cell from the division of a single parent cell to produce two new daughter cells and are highly conserved across eukaryotes.…
Let’s model mitosis. Focus on drawing the cell nucleus taking care to model the number and location of chromosomes. Although the chromosomes are only visible in each stage, draw them in all stages for clarity sake.
Draw a 2n=4 cell at G1 of interphase.
Draw the same cell at the start of prophase.
Draw the same cell at metaphase.
Draw the cell(s) that result at the end of cytokinesis.
Chapter 25 Solutions
Becker's World of the Cell (9th Edition)
Ch. 25 - Cloning can be done by somatic cell nuclear...Ch. 25 - If the DNA content of a diploid cell in the G1...Ch. 25 - Prob. 25.3CCCh. 25 - Prob. 1QCh. 25 - Prob. 25.4CCCh. 25 - What do you think would happen to a pathogenic...Ch. 25 - Prob. 25.6CCCh. 25 - The Truth About Sex. For each of the following...Ch. 25 - Ordering the Phases of Meiosis. Drawings of...Ch. 25 - Telling Them Apart. Briefly describe how you might...
Ch. 25 - Prob. 25.4PSCh. 25 - More about DNA. Let X be the amount of DNA present...Ch. 25 - Meiotic Mistakes. Infants born with Patau syndrome...Ch. 25 - Prob. 25.7PSCh. 25 - QUANTITATIVE Punnett Squares as Genetic Tools. The...Ch. 25 - QUANTITATIVE Genetic Mapping. The following table...Ch. 25 - Prob. 25.10PSCh. 25 - Prob. 25.11PS
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- Sequence meiosis. A tapir is a mammal. They have 28 autosomes and 2 sex chromosomes in each of their brain cells. What is the number of autosomes and sex chromosomes contained in a tapir’s sperm? 28 autosomes and 2 sex chromosomes 14 autosomes and 1 sex chromosome 28 autosomes and 1 sex chromosome 56 autosomes and 4 sex chromosomesarrow_forwardQuestion : if our society the women are often blamed for given brith to daughters .can you explain why this is not correct ?(or) justify the fact that in human beings , sex of the child is determined by father , not by mother .? Answer ; All human being's have 23 pairs of chromosome .Human males have 22 pairs at autosomes and coutain one or two types of sex chromosome .they are either X And Y .on contrary, females have 22 pairs of autosomes and contain only the X sex chromosome .the Sex of an individual is determined by the type of the male gametes (X or Y) , which fuses with the X chromosome of the female. Ic the fertilizing sperms is X , then the baby will be girl and if it is Y, then the baby will be boy .Hence , it is incorrect to blame a women for the gender of the child.arrow_forwardIn a human somatic cell (normal body cell) that is in G2, what would be true about chromosome number and structure? Check all that apply. Check All That Apply These cells would be considered haploid (n).These cells would be considered haploid (n). The chromosomes would be in the replicated state.The chromosomes would be in the replicated state. The chromosomes would be attached to microtubules at their centromeres.The chromosomes would be attached to microtubules at their centromeres. These cells would contain homologous chromosomes.These cells would contain homologous chromosomes. These cells would contain sister chromatids.These cells would contain sister chromatids. The chromosomes will be aligned in the middle of the cell. The chromosomes will be aligned in the middle of the cell.arrow_forward
- Examine Figure . What type of chromosome (metacentric, submetacentric, acrocentric, or telocentric) is chromosome 1? What about chromosome 4?arrow_forwardMeiosis- a. Are the chromosomes at each pole during telophase 1 identical to chromosomes in the original cell (prior to S phase of cell cycle)? b. How about telophase 2?arrow_forwardMeiosis: Sequence of Stages Number the stages of meiosis from 1 to 8 to show their correct chronological sequence. [Choose] [Choose] Prophase I Prophase II Metaphase I libraries Anaphase I Telophase I Telophase II Anaphase II Metaphase II nstructional urvey 3. 4 [Choose ] [Choose ) 6 [Choose] 7. [Choose ] 8. [Choose] > >arrow_forward
- Select two that apply. Which of the following generate genetic diversity in meiosis? homologous chromosomes are separated during anaphase II homologous chromosomes align individually during metaphase II O bivalents align independently from other bivalents during metaphase I sister chromatids exchange genetic material during prophase I homologous chromosomes exchange genetic material during prophase I meiosis goes through two rounds of divisionarrow_forwardComic San.. BIUA ===|三 Normal text 12 II1 3 CP Unit 6 Review: Meiosis Page 1. What type of cell undergoes meiosis? Gamete cells Somațic cells or 2. What are homologous chromosomes? 3. For each of the following state if the cell is haploid or diploid. Sperm cell = Liver cell = Egg cell = Stomach cell = 4. If the diploid number in a liver cell is 52, how many chromosomes are there in the egg of this organism? 5. During meiosis, the chromosome number: a) is doubled becomes diploid b) is reduced c) remains the same d) 6. Cells starting mitosis & meiosis begin with a (haploid or diploid) set of chromosomes. 7. How many times do cells divide during meiosis? 8. What are the stages of meiosis called? Meiosis I: II lılıarrow_forwardCell Cycle. Mitosis. and Meiosis: 19) Draw a cell with 4 pairs of homologous chromosomes (aka a diploid number of 8 (2n=8)) in anaphase of mitosis. In the diagram, label the homologous chromosomes, sister chromatids, centromeres, and mitotic spindle.arrow_forward
- Still studying meiosis. How many chromosomes does a haploid cell have? In prophase II how many chromosomes does each daughter cell have?arrow_forwardMeiosis - How Your Body Makes Sperm or Eggs Name:2omlyilm020 Mitosis gives rise to almost all the cells in the body. A different type of cell division called meiosis gives rise to sperm and eggs. During fertilization the sperm and egg unite to form a single cell called the zygote which contains chromosomes from both the sperm and egg. The zygote undergoes mitosis to begin development of the human embryo which eventually becomes a baby. Why can't your body use mitosis to make sperm or eggs? 1. Suppose human sperm and eggs were produced by mitosis. How many chromosomes would each sperm or egg have? 2. If a sperm of this type fertilized an egg of this type, and both the sperm and egg contributed all of their chromosomes to a zygote, how many chromosomes would the resulting zygote have? 3. In humans, how many chromosomes should a zygote have, so the baby's body cells will each have a normal set of chromosomes? Obviously, if the body used mitosis to make sperm and eggs, the resultant zygote…arrow_forwardsequence. Name each stage of mitosis, A to E. Each answer choice only once. used once and Picture A Metaphase [Choose ] Metaphase Anaphase Prometaphase Telophase Prophase Telophase Picture B Picture C Picture D Anaphase Picture El Promctaphasearrow_forward
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