EBK CAMPBELL BIOLOGY
EBK CAMPBELL BIOLOGY
10th Edition
ISBN: 9780136539414
Author: Reece
Publisher: VST
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Chapter 13, Problem 11TYU

SYNTHESIZE YOUR KNOWLEDGE

Chapter 13, Problem 11TYU, SYNTHESIZE YOUR KNOWLEDGE For selected answers, see Appendix A. The Cavendish banana, the world's

For selected answers, see Appendix A.

The Cavendish banana, the world's most popular fruit, is currently threatened by extinction due to a fungus. This banana variety is "triploid" (311, with three sets of chromosomes) and can only reproduce through cloning by cultivators. Given what you know about meiosis, explain how the banana's triploid number accounts for its inability to form normal gametes. Considering genetic diversity, discuss how the absence of sexual reproduction might make this domesticated species vulnerable to infectious agents.

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Meiosis In this worksheet, you will review the steps of meiosis and view video simulations of this type of cell division. You will also view an onion root tip and calculate the percentage of cells at each of the stages of cell division. Stages of Meiosis Visit http://www.biology.arizona.edu/cell_bio/tutorials/meiosis/main.html for an additional review of Meiosis Part 1: Reproduction 1. Give an example of asexual reproduction. 2. What is a clone? 3. What is the difference between haploid and diploid? Part 2: Chromosomes in a Diploid Cell 4. What is the diploid chromosome number for humans? 5. Egg and sperm cells are [haploid / diploid] Part 3: Meiosis 1 and Meiosis 2 6. Name the stage of meiosis 1 where each of the following occurs: ● Homologous chromosomes pair and form synapses. . Bivalents align at metaphase plate ● Two complete daughter cells form Nuclear membrane disappears. Nuclear membrane reforms. Chromosomes move to separate pole ● ●
Please answer fast Sexual reproduction is a way to create genetic variation in the offspring.a. Describe in which circumstances this is desired.b. Describe the three different processes in a sexual life cycle that create genetic variation.For each process, describe in detail during which part or phase the sexual life cycle ittakes place.c. Consider this diploid animal cell in G1 phase. What is the haploid and the diploid number of this cell?
Humans cells normally have 46 chromosomes (2n). Specify the number of chromosomes present at each of the following stages. In your answers, determine diploid or haploid number of chromosomes and the count the chromatids as chromosomes. For example: anaphase I of meiosis: 46 (2n) = 92    a. metaphase I of meiosis b. metaphase of mitosis c. telophase I of meiosis d. telophase II of meiosis
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