ESSENTIAL QUESTIONS:
How many chromosomes do eukaryotes have?
Do chromosomes occur in pairs? Why?
What is the difference between an X shaped chromosomes and I shaped chromosome?
UNDERSTANDINGS / APPLICATIONS / SKILLS / NATURE OF SCIENCE
3.2.U1: Prokaryotes have one chromosome consisting of a circular DNA molecule
3.2.U2: Some prokaryotes also have plasmids but eukaryotes do not.
3.2.A1: Cairns’ technique for measuring the length of DNA by autoradiography.
3.2.NOS: Developments in research follow improvements in techniques- autoradiography was used to establish the length of DNA molecules in chromosomes.
3.2.U4: In a eukaryote species there are different chromosomes that carry different genes.
3.2.U5: Homologous chromosomes carry the same sequence of genes but not necessarily the same alleles of those genes
3.2.U6: Diploid nuclei have pairs of homologous chromosomes.
3.2.U7: Haploid nuclei have one chromosomes of each pair
3.2.U8: The number of chromosomes is a characteristic feature of members of a species
3.2.A3: Comparison of diploid chromosome numbers of Homo sapiens, Pan troglodytes, Canis familiaris, Oryza sativa, Parascaris equorum
3.2.A2: Comparison of genome size in T2 phage, Escherichia coli, Drosophila melanogaster, Homo sapiens, Paris japonica.
3.2.U10: Sex is determined by sex chromosomes and autosomes are chromosomes that do not determine sex.
6.6.U5: A gene on the Y chromosomes causes embryonic gonads to develop as testes and secretes testosterone.
3.2.U9: A karyogram shows the chromosomes of an organism in homologous pairs of decreasing length.
3.3.A2: Description of methods used to obtain cells for karyotype analysis e.g. chorionic villus sampling and amniocentesis and the associated risks.
3.2.A4: Use karyograms to deduce sex and diagnose Down Syndrome in humans.
How many chromosomes do eukaryotes have?
Do chromosomes occur in pairs? Why?
What is the difference between an X shaped chromosomes and I shaped chromosome?
UNDERSTANDINGS / APPLICATIONS / SKILLS / NATURE OF SCIENCE
3.2.U1: Prokaryotes have one chromosome consisting of a circular DNA molecule
3.2.U2: Some prokaryotes also have plasmids but eukaryotes do not.
3.2.A1: Cairns’ technique for measuring the length of DNA by autoradiography.
3.2.NOS: Developments in research follow improvements in techniques- autoradiography was used to establish the length of DNA molecules in chromosomes.
3.2.U4: In a eukaryote species there are different chromosomes that carry different genes.
3.2.U5: Homologous chromosomes carry the same sequence of genes but not necessarily the same alleles of those genes
3.2.U6: Diploid nuclei have pairs of homologous chromosomes.
3.2.U7: Haploid nuclei have one chromosomes of each pair
3.2.U8: The number of chromosomes is a characteristic feature of members of a species
3.2.A3: Comparison of diploid chromosome numbers of Homo sapiens, Pan troglodytes, Canis familiaris, Oryza sativa, Parascaris equorum
3.2.A2: Comparison of genome size in T2 phage, Escherichia coli, Drosophila melanogaster, Homo sapiens, Paris japonica.
3.2.U10: Sex is determined by sex chromosomes and autosomes are chromosomes that do not determine sex.
6.6.U5: A gene on the Y chromosomes causes embryonic gonads to develop as testes and secretes testosterone.
3.2.U9: A karyogram shows the chromosomes of an organism in homologous pairs of decreasing length.
3.3.A2: Description of methods used to obtain cells for karyotype analysis e.g. chorionic villus sampling and amniocentesis and the associated risks.
3.2.A4: Use karyograms to deduce sex and diagnose Down Syndrome in humans.