Biology: Life on Earth
10th Edition
ISBN: 9780321729712
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: Benjamin Cummings
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Textbook Question
Chapter 16, Problem 4RQ
A drug called colchicine prevents cell division after the chromosomes have doubled at the start of meiosis. Describe how you would use colchicine to produce a new polyploid plant species.
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Use an illustration to show the differences between mitosis and meiosis.
Explain three processes that give rise to genetic variation.
The diagram below shows a pair of homologous chromosomes in a diploid cell. Which of the following is the correct diagram of the gametes that produced the cell if there were no errors in meiosis?
A species has homologous chromosomes. What does this say about the species?
When does DNA replication occur during meiosis?
a.
during telophase
b.
during prophase I
c.
during anaphase and telophase
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during interphase before meiosis I begins
Chapter 16 Solutions
Biology: Life on Earth
Ch. 16 - 1. A species is a group of _________ that evolves...Ch. 16 - 2. Fill in the following with the appropriate...Ch. 16 - 3. Formation of a new species occurs when two...Ch. 16 - Prob. 4FTBCh. 16 - Prob. 5FTBCh. 16 - Define the following terms: species, speciation,...Ch. 16 - Review the material on the possibility of...Ch. 16 - Many of the oak tree species in central and...Ch. 16 - 4. A drug called colchicine prevents cell division...Ch. 16 - What are the two major types of reproductive...
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- Which event leads to a diploid cell in a life cycle? a. meiosis b. fertilization c. alternation of generations d. mutationarrow_forwardHow can duplications arise? A. by uneven crossing over during meiotic prophase B. by the loss of a telomere C. by chromosome breakage and exchange of arms D. by spindle failure during chromosome separationarrow_forwardExplain how meiosis is able to produce cells with a haploid number of chromosomes and explain exactly what happens in meiosis how the chromosome number becomes haploid; and how meiosis differs from mitosis.arrow_forward
- Which statement is true of meiosis? 1)two identical cells in both divisions 2)the first division produces haploid cells and the second produces diploid cells 3)the first division produces diploid cells and the second produces haploid cells 4) the products of both meiotic divisions are haploidarrow_forwardWhich process leads to independent assortment? a)The process of separating chromosomes b)The random alignment of homologs with respect to the others on the metaphase plate c)The process of forming the mitotic spindle d)The process of cytokinesisarrow_forwardWhat is the main difference between autopolyploid and allopolyploid? a. the number of chromosomes b. the functionality of the chromosomes c. the source of the extra chromosomes d. the number of mutations in the extra chromosomesarrow_forward
- If meiosis produce haploid cells, how is the diploid numberrestored for those organisms that spend most of their life cycle in the diploid state? a. DNA replication b. reverse transcription c. synapsis d. fertilizationarrow_forwardExplain the terms haploid, diploid, and polyploid. Why is polyploidy so much more common in plants than in animals? Give examples of polyploid animals. Polyploid plants may occur naturally or they may be created intentionally by agricultural scientists. List four examples of polyploid commercial crops and explain why they are superior to their diploid ancestors.arrow_forwardIf the liver cells of an animal have 48 chromosomes, the sperm cells would have how many chromosomes? Question 5 options: a) 24 b) Twice the diploid number c) Half the haploid number d) 48arrow_forward
- Make a simulation of the phases of mitosis and meiosis with imagearrow_forwardWhich event occurs during meiosis that increases genetic variation and contributes to the process of evolution? A. Cytokinesis occurs and separates the cytoplasm and its contents into daughter cells. B. Diploid gametes divide to form haploid daughter cells with unique genetic makeup. C. During interphase, homologous chromosomes are duplicated to form sister chromatids. D. Segments of DNA are exchanged between homologous chromosomes during crossing over.arrow_forwardB. Meiosis C. Could be either mitosis or meiosis QUESTION 5 What is the role of nonkinetochore microtubules? A. They move the chromosomes to either side of the cell during cell division B. They elongate the cells prior to cell division OC. They aid in DNA replication prior to cell division D. they help to create the cell plate Click Save and Submit to save and submit. Click Save All Answers to save all answers.arrow_forward
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