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chromosomes and human heredity

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Subject: 
Biology
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Biology
Genetics
Cytogenetics
Chromosomes
Molecular genetics
Cell cycle
Meiosis
Nondisjunction
Karyotype
Telomere
Metaphase
Homologous chromosome
Technology

2/21/13 2:31 PM Scientists don?t just study genes, they also study whole chromosomes by using images of chromosomes stained during metaphase Karyotype- pairs of homologous chromosomes arranged in decreasing size to produce a micrograph Telomeres Telomeres- chromosome s end in protective caps, these caps consist of DNA associated with protiens The telomere also might be involved with aging and caner Nondisjunction Cell division during which sister chromatids fail to separate properly, this can take place during meiosis I or meiosis II One form two kinds of gametes result One has an extra one and one is missing one Organisms with an extra chromosome can survive but those lacking one usually do not Monosomy- lacking a chromosome in humans don?t usually survive

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