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The answer is 20. Duplicated chromosome has two sister chromatids, identical copies of the chromosome. These two chromatids are joined at the region called centromere. Therefore, one duplicated chromosome has one centromere and two sister chromatids. If there are 20 duplicated chromosomes in a cell, there will be 20 centromeres.
Rating Newest Oldest. Best Answer: Prior to meiosis I, there are 46 chromosomes, each with two chromatids (total of 92 chromatids). At the end of meiosis I (the reduction division), there will be 23 chromosomes (each having two chromatids, for a total of 46 chromatids) in each cell.