Download NAME: ______ ASSIGNMENT 1. and 2. DUE:_Monday, January 14

NAME:
_________ ASSIGNMENT 1. and 2. DUE:_Monday, January 14.
Chapter 13 Meiosis and the Sexual Life Cycle
These 2 assignments may be found on the Campbell Web Site
1. Do the following Case Study: How Can the Frequency of Crossing Over Be Estimated?
Turn in: a completed copy of the lab note page; lab questions and answers; Quiz II questions and
answers
(alternatively go to this web site: http://www.phschool.com/science/biology_place/labbench/index.html
Or Google “Lab Bench” or “The Biology Place”—then go to Lab Bench, complete Lab 3, Meiosis;
(submit same as above)
2. Go toWeb Links, Click on the second one: Meiosis Tutorial (U. of Arizona website—The Biology
Project http://www.biology.arizona.edu/DEFAULT.HTML ), and complete this activity, Write out or
copy/paste for submission, the questions and the answers to the problem set on Meiosis.
For the Karyotype Section, do all three activities; write out the questions and answers to turn it .
Chapter Learning Objectives—ANSWERS NEED NOT BE
TURNED IN—WILL COLLECT The “STUDY GUIDE” instead.
An Introduction to Heredity
1. Be able explain why organisms reproduce only their own kind and why offspring more closely resemble
their parents than unrelated individuals of the same species.
2. Describe what makes heredity possible?
3. Distinguish between asexual and sexual reproduction.
The Role of Meiosis in Sexual Life Cycles
4. Be familiar with the diagram the human life cycle, compared to life cycles of plants; fungi.
5. Distinguish among the life cycle patterns of animals, fungi, and plants, which cells are the result of
meiosis and mitosis; and which cells are haploid
6. Be able to describe the events characterize Meiosis I and Meiosis II. Recognize the phases of meiosis
from diagrams or micrographs.
7. Be able to describe the process of synapsis during prophase I and explain how genetic recombination
occurs.
******8. Describe the key differences between mitosis and meiosis. Explain how the end result of meiosis
differs from that of mitosis.
Origins of Genetic Variation
****** 9. Explain how independent assortment, crossing over, and random fertilization contribute to
genetic variation in sexually reproducing organisms.
10. Briefly explain why heritable variation was crucial to Darwin's theory of evolution.
PRACTICE QUESTIONS
Asexual reproduction _____. (p. 235)
is limited to plants
leads to a loss of genetic material
produces offspring genetically identical to the parent
produces offspring that always look exactly like the parent
is limited to single-cell organisms
2.
A human somatic cell contains _____ chromosomes. (p. 236)
23
47
2n
46
n
3.
Which of the following is a normal human female? (p. 236)
XY
XXY
XXX
X
XX
4.
The diploid stage of a plant that exhibits an alternation of generations is the _____. (p. 239)
antheridium
gametophyte
spore
archegonium
sporophyte
5.
Replication of all the chromosomal DNA occurs _____. (p. 239)
whenever a cell makes protein
to repair gene damage caused by mutation
before a cell divides
whenever a cell needs RNA
in the cytoplasm of a eukaryotic cell
6.
Mitosis and cytokinesis result in the formation of ______; meiosis and cytokinesis result in the formation of
________. (p. 242)
four diploid cells ... four haploid cells
two diploid cells ... two haploid cells
two diploid cells ... four haploid cells
two diploid cells ... two diploid cells.
four haploid cells ... two diploid cells
-------------------------------------------------------------------------------7.
Which of the following occurs during meiosis but not during mitosis? (p. 242)
Chromosomes align at the metaphase plate.
Chromosomes condense.
Chromosomes migrate to opposite poles.
A spindle apparatus forms.
Synapsis.
8.
Crossing over is _____. (p. 244)
the movement of genetic material from one chromosome to a nonhomologous chromosome
and independent assortment of chromosomes
the formation of tetrads
the exchange of homologous portions of nonsister chromatids
making an RNA copy of a DNA strand
9.
Variation occurs when chromosomes are shuffled in _____ and fertilization. (p. 243)
mitosis
genetic drift
natural selection
mutation
meiosis
10.
Heritable variation is required for _____. (p. 24)
meiosis
mitosis
evolution
asexual reproduction
the production of a clone
Karyotyping Activity : ( this is at :
http://www.biology.arizona.edu/human_bio/activities/karyotyping/karyotyping.html
Your assignment
This exercise is designed as an introduction to genetic studies on humans. Karyotyping is one of many
techniques that allow us to look for several thousand possible genetic diseases in humans.
You will evaluate 3 patients' case histories, complete their karyotypes, and diagnose any missing or extra
chromosomes. Then you'll conduct research on the internet to find web sites that cover some aspect of
human genetics. If this is an assignment for a class, you should turn in a total of 7 answers on paper (2 for
each patient, 1 for the internet search).