ANTH 1001Feb5

ANTH 1001Feb5 - ANTH 1001 Cell Division Mistakes o...

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ANTH 1001 Feb.5 Cell Division Mistakes o nondisjunction – failure of chromosomes to separate during meiosis; more life threatening in autosomes; results in monosomy or trisomy o monosomy – one less chromosome (45 total) o ex: XO – Turner’s Syndrome (female) o trisomy – one too many chromosomes (47 total) o ex: autosomal T21 – Down’s Syndrome T18 – Edward’s Syndrome T13 – Patau’s Syndrome o ex: sex chromosome XXY – Kleinfelter’s Syndrome (male) XXX – female XYY – male Mendelian Genetics o Mendel – father of modern genetics o looked at expression of physical traits in pea plants o experiments discredited blending Genetic Principles o Principles of Segregation o genes or chromosomes will occur in pairs o separate during gamete production o reunited during fertilization o Gene / Allele o allele – alternate form of gene; carries info on same trait o dominant – allele that is expressed even in presence of another different allele; not necessarily more common or better o recessive – not expressed in presence of another different allele o locus – site on chromosome where gene is located
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ANTH 1001Feb5 - ANTH 1001 Cell Division Mistakes o...

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