During metaphase of mitosis, each chromosome consists of two identical sister chromatids. These sister chromatids are joined together at a region called the centromere. Each sister chromatid contains one copy of the DNA double helix. Therefore, in terms of DNA content, each chromosome during metaphase contains two copies of each DNA double helix (one in each sister chromatid).
during metaphase of mitosis how many copies of each dna double helix are contained in each chromosome
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