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chromosome theory of inheritance
a theory that states that genes have specific positions along chromosomes that undergo independent assortment
the phenotype that is different from the wild type that us usually caused by a mutation
Duchenne muscular dystrophy
a disease that causes weakening and loss of coordination. due to a gene that is x-linked
the condensed body of inactive x chromosomes in females when only one half needs to be active
when an abberant gamete (one affected by nondisjunction) joins a normal gamete, the daughter cells are aberrant too
when an organism has more than 2 chromosome sets (triploidy has 3 sets; tetraploidy has 4 sets)
a sister chromatid gets another segment that is the same as one it already has. it usually comes from a deleted chromatid
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