i just need number 2 (compare them), and number 3 No Crossing OverCrossing OverAppearance of Gamete CellsAppearance of Gamete CellsConclusions:1. Define crossing over and explain when it occurs.2. Compare any differences in the appearance of genes on chromosomes in gamete cellswhen crossing over occurs and when it does not occur.3. Crossing over has been compared to "shuffling the deck" in cards, Explain what thismeans,4. What would be accorExplain your answer.mplished if crossing over occurred between sister chromatids? Problem: How does crossing over affect the genes passed down to the daughter cells?Experiment:Materials:Modeling clay (or spaghetti noodles, or pipe cleaners, or something similar)2 twist tiesProcedure:1. Roll out four long strands of clay at least 10 cmlong to represent two chromosomes, each withtwo chromatids.2. Use the figure to the right as a guide in joiningand labeling these model chromatids. Althoughthere are four chromatids, assume that theystarted out as a single pair of homologouschromosomes prior to replication. The figureshows tetrad formation during prophase I of2 Chromosomes with chromatidsTwist tieMark geneswith a pencilpointmeiosis.3. First, assume that no crossing over takes place.Model the appearance of the four gamete cellsthat will result at the end of meiosis. Recordyour model's appearance by drawing the gametes'chromosomes and their genes in the data tablebelow.Nonsister chromatids4. Next, repeat steps 1-3, however, assume thatcrossing over occurs between genes B and C. Seethe picture at the right as an example.

Crossing over : It is essential for the segregation of chromosomes during meiosis . It also accounts…

2. Compare any differences in the appearance of genes on chromosomes in gamete cells when crossing over occurs and when it does not occur. 3. Crossing over has been compared to "shuffling the deck" in cards. Explain what this means,

2. Compare any differences in the appearance of genes on chromosomes in gamete cells when crossing over occurs and when it does not occur. 3. Crossing over has been compared to "shuffling the deck" in cards. Explain what this means,

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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