Tutorial |
· Animation and description of phases of mitosis |
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Tutorial |
· Animation and description of phases of meiosis |
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1. Mitosis |
· Stages of cell cycle |
· "c" vs "n" |
· DNA replication, sister chromatids, homologous chromosomes |
· Mitotic division phases |
· Alleles on sister chromatids |
· Drag and drop chromosomes to emulate mitosis |
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2. Meiosis |
· Consequences of sexual reproduction without meiosis |
· Drag and Drop chromosomes to emulate meiosis I |
· Drag and Drop chromosomes to emulate meiosis II |
· Number of gametes formed |
· Phases of meiosis, values of c, n |
· Karyotypes |
· Sex chromosomes |
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3. Independent Assortment |
· Drag and Drop two pairs of chromosomes to emulate meiosis I |
· Gametes formed during meiosis II |
· Linkage: independent assortment of chromosomes not necessarily markers |
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4. Microscopy |
· Mitosis vs meiosis |
· "c" vs "n" |
· haploid vs diploid |
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Problems |
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1. X linked recessive trait |
· Dominant vs recessive |
· X linked vs autosomal |
· Genotypes |
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2. X linked recessive trait (Hemophilia) |
· Genotypes |
· Probability of affected children |
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3. X linked dominant trait (Vitamin D rickets) |
· Dominant vs recessive |
· X linked vs autosomal |
· Genotypes |
· Probabilities |
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4. X linked common recessive trait (Red green colorblindness)
and Sickle cell anemia (autosomal recessive) |
· Independent Assortment |
· Probabilities |
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5. Nondisjunction |
· Colorblindness and Turner syndrome |
· Colorblindness and Klinefelter syndrome |
· Identify parent where nondisjunction occurred |
· Nondisjunction in Meiosis I or II |
· White eyes in flies |
· Sex determination in flies |
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1. Monhybrid cross, recessive (brown) |
· Dominant vs recessive |
· Drosophila nomenclature |
· Genotypes |
· Testcross |
· Phenotypic ratios |
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2. Monohybrid cross, dominant (lobed) |
· Dominant vs recessive |
· Drosophila nomenclature |
· Genotypes |
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3. Monohybrid cross, X linked recessive (white) |
· Reciprocal crosses to F2 |
· Dominant vs recessive |
· X linked vs autosomal |
· Drosophila nomenclature |
· Genotypes |
· Phenotypic ratios |
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4. Monohybrid cross, X linked dominant (Bar) |
· Reciprocal crosses to F2 |
· Dominant vs recessive |
· X linked vs autosomal |
· Drosophila nomenclature |
· Genotypes |
· Phenotypic ratios |
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5. Dihybrid cross, two autosomal recessives (ebony, purple) |
· Dominant vs recessive |
· X linked vs autosomal |
· Genotypes |
· Phenotypic ratios |
· Testcross |
· Testcross ratios |
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6. Dihybrid cross, X linked and autosomal (sable, dumpy) |
· Reciprocal crosses |
· Dominant vs recessive |
· X linked vs autosomal |
· Genotypes |
· Phenotypic ratios |
· Testcross |
· Testcross ratios |