Unit 17: Meiosis (final)
“This final Knowledge Audit will gauge your understanding of the material for the "Meiosis" unit after instruction has ended. Your teacher will use the information to see where you have grown and what you still feel you need to improve on. Please answer each question accurately and honestly."
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Syllabus Statements
For each statement below, indicate your level of confidence and knowledge about the statement using the following scale:
1. Very poor: you've never heard of this topic or idea.
2. Poor: you've heard this, but couldn't tell share any detailed information about it.
3. Fair: you remember the basic information about this topic or idea.
4. Good: you remember details and examples about this topic or idea.
5. Very good: you could teach others about this topic or idea.
3.3.NOS: Making careful observations- meiosis was discovered by microscope examination of dividing germ-line cells. *
Discuss difficulties in microscopic examination of dividing cells. Describe the discovery of meiosis.
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3.3.U2: The halving of the chromosomes number allows a sexual life cycle with fusion of gametes *
Compare sexual and asexual life cycles. Explain why meiosis must occur as part of a sexual life cycle.
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3.3.U1: One of diploid nucleus divides by meiosis to produce four haploid nuclei *
Compare divisions of meiosis I and meiosis II.
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3.3.S1: Drawing diagrams to show the stages of meiosis resulting in the formation of four haploid cells *
Outline the events of prophase, metaphase, anaphase and telophase in meiosis I and meiosis II. Draw diagrams of cells in prophase, metaphase, anaphase and telophase in meiosis I and meiosis II.
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3.3.U3: DNA is replicated before meiosis so that all chromosomes consist of two sister chromatids *
State that DNA is replicated in interphase before meiosis. Given a diploid number (for example 2n=4), outline the movement and structure of DNA through the stages of meiosis.
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Very Good
10.1.U1: Chromosomes replicate in interphase before meiosis *
Identify tetrad, bivalent, sister chromatids and non-sister chromatids in diagrams of replicated chromosomes.
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3.3.U4: The early stages of meiosis involved pairing of homologous chromosomes and crossing over followed condensation *
List three events that occur in prophase 1 of meiosis. Define bivalent and synapsis. Outline the process and result of crossing over.
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10.1.U2: Crossing over is the exchange of DNA material between non-sister homologous chromatids *
State that crossing over occurs during prophase I. Define chiasmata.
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10.1.U3: Chiasmata formation between non-sister chromatids can results in an exchange of alleles *
State two consequences of chiasmata formation between non-sister chromatids.
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Very Good
10.1.S1: Drawing diagrams to show chiasmata formed by crossing over *
Draw a diagram to illustrate the process and result of crossing over.
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Very Good
3.3.U5: Orientation of pairs of homologous chromosomes prior to separation is random *
Describe the attachment of spindle microtubules to chromosomes during meiosis I. Describe random orientation of chromosomes during meiosis I.
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Very Good
10.1.U6: Independent assortment of genes is due to the random orientation of pairs of homologous chromosomes in meiosis 1 *
Describe random orientation and independent assortment. Given a parent cell genotype, determine the allele combinations that are possible in the gametes due to independent assortment and random orientation.
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Very Good
10.1.U5: Homologous chromosomes separate in meiosis I *
Contrast meiosis I with meiosis II.
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3.3.U6: Separation of pairs of homologous chromosomes in the first division of meiosis halves the chromosome number *
Explain why meiosis I is a reductive division. State that cells are haploid at the end of meiosis I.
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Very Good
10.1.U7: Sister chromatids separate in meiosis II *
Compare meiosis II with mitosis.
Very Poor
Very Good
3.4.U3: The alleles of each gene separates into different haploid daughter nuclei during meiosis *
State the outcome of allele segregation during meiosis.
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10.2.U1: Unlinked genes segregate independently as a result of meiosis. *
State the difference between independent assortment of genes and segregation of alleles. Describe segregation of alleles and independent assortment of unlinked genes in meiosis.
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Very Good
10.1.U4: Crossing over produces new combinations of alleles on the chromosomes of the haploid cells *
Draw a diagram to illustrate the formation of new allele combinations as a results of crossing over.
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3.3.U7: Crossing over and random orientation promotes genetic variation *
Explain how meiosis leads to genetic variation in gametes. State the the number of chromosome combinations possible due to random orientation is 2n.
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3.3.U8: Fusion of gametes from different parents promotes genetic variation *
Outline the role of fertilization as a source of genetic variation.
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3.3.A1: Non-disjunction can cause Down syndrome and other chromosome abnormalities. Studies showing age of parents influences chances of non-disjunction *
Define non-disjunction. State the result of nondisjunction. Describe the cause and symptoms of Down syndrome. Explain the relationship between parental age and chances of non-disjunction.
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