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Chromosome Structure
· Chromatin
A DNA double helix wrapped around
histones (proteins)
· These condense into a chromosome
(has a centromere)…read more

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After DNA replication the chromosome has 2
identical sister chromosomes…read more

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Diploid
· Cells that have the full number of
chromosomes…read more

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Haploid
· Cells that have half the number of
chromosomes (gametes)…read more

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Alleles
· A different form of the same gene
· As chromosomes occur in pairs, you have 2
forms of every gene
· Gametes only have one form of each gene as
they are haploid and so have half the number
of chromosomes…read more

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