If a haploid cell contains 16 chromosomes, how many does the diploid cell contain?  

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The terms haploid and diploid are commonly used when discussing cells. These refer to the number of chromosome sets held within the cell. Normal body cells are diploid, since they contain 2 sets of chromosomes (hence the prefix 'di' which means two). One of these chromosomal sets is donated by the mother, while the other set is from the father. In comparison, haploid cells contain only one set of chromosomes. Sex cells (such as eggs and sperm) are haploid. Thus, a diploid cell will contain twice as many chromosomes as a haploid cell.

If the haploid cell contains 16 chromosomes, the diploid cell will contain twice this number, 32 chromosomes. Half of these would be contributed by one parent and the other half by the other parent. 

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