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 Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter3: Transmission Of Genes From Generation To Generation

Section: Chapter Questions

Problem 23QP: Meiosis Explains Mendels Results: Genes Are on Chromosomes Discuss the pertinent features of meiosis...

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Question

i just need number 2 (compare them), and number 3

No Crossing Over
Crossing Over
Appearance of Gamete Cells
Appearance of Gamete Cells
Conclusions:
1. Define crossing over and explain when it occurs.
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,
4. What would be accor
Explain 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 ties
Procedure:
1. Roll out four long strands of clay at least 10 cm
long to represent two chromosomes, each with
two chromatids.
2. Use the figure to the right as a guide in joining
and labeling these model chromatids. Although
there are four chromatids, assume that they
started out as a single pair of homologous
chromosomes prior to replication. The figure
shows tetrad formation during prophase I of
2 Chromosomes with chromatids
Twist tie
Mark genes
with a pencil
point
meiosis.
3. First, assume that no crossing over takes place.
Model the appearance of the four gamete cells
that will result at the end of meiosis. Record
your model's appearance by drawing the gametes'
chromosomes and their genes in the data table
below.
Nonsister chromatids
4. Next, repeat steps 1-3, however, assume that
crossing over occurs between genes B and C. See
the picture at the right as an example.

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