Unit 16: Chromosomes (final)
“This final Knowledge Audit will gauge your understanding of the material for the "Chromosomes" 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.
3.2.U5: Homologous chromosomes carry the same sequence of genes but not necessarily the same alleles of those genes. *
Define Homologous chromosome. State a similarity and a difference found between pairs of homologous chromosomes.
Very Poor
Very Good
3.2.U6: Diploid nuclei have pairs of homologous chromosomes. *
Define diploid. State the human cell diploid number. Outline the formation of a diploid cell from two haploid gametes.
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Very Good
3.2.U7: Haploid nuclei have one chromosome of each pair. *
Define haploid. State the human haploid number. List examples of haploid cells.
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3.2.U10: Sex is determined by sex chromosomes and autosomes are chromosomes that do not determine sex. *
Outline the structure and function of the two human sex chromosomes. Outline gender determination by sex chromosomes.
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Very Good
6.6.U5: A gene on the Y chromosome causes embryonic gonads to develop as testes and secrete testosterone. *
Describe the mechanism by which the SRY gene regulates embryonic gonad development.
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3.2.U8: The number of chromosomes is a characteristic feature of members of a species. *
State that chromosome number and type is a distinguishing characteristic of a species. List mechanisms by which a species' chromosome number can change.
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Very Good
3.2.A3: Comparison of diploid chromosome numbers of Homo sapiens, Pan troglodytes, Canis familiaris, Oryza sativa, Parascaris equorum. *
State the minimum chromosome number in eukaryotes. Explain why the typical number of chromosomes in a species is always an even number. Explain why the chromosome number of a species does not indicate the number of genes in the species. Explain the relationship between the number of human and chimpanzee chromosomes.
Very Poor
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3.2.A1: Cairn's technique for measuring the length of DNA by autoradiography. *
Describe Cairn's technique for producing images of DNA molecules from E. coli. Outline conclusions drawn from the images produced using Cairn's autoradiography technique.
Very Poor
Very Good
3.2.NOS: Developments in research follow improvements in techniques- autoradiography was used to establish the length of DNA molecules in chromosomes. *
Outline the advancement in knowledge gained from the development of autoradiography techniques.
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Very Good
3.2.U9: A karyogram shows the chromosomes of an organism in homologous pairs of decreasing length. *
Describe the process of creating a karyogram. List the characteristics by which chromosomes are arranged in a karyogram.
Very Poor
Very Good
3.3.A2: Description of methods used to obtain cells for karyotype analysis e.g.chorionic villus sampling and amniocentesis and the associated risks. *
Describe the two procedures for obtaining fetal cells for production of a karyotype.
Very Poor
Very Good
3.2.A4: Use karyograms to deduce sex and diagnose Down Syndrome in humans. *
Distinguish between a karyogram and a karyotype. Deduce the sex of an individual given a karyogram. Describe the use of a karyogram to diagnose Down syndrome.
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