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The number of chromosomes does not correlate with the apparent complexity of an animal or a plant: in humans, for example, the diploid number is 2n = 46 (that is, 23 pairs), compared with 2n = 78, or 39 pairs, in the dog and 2n = 36 (18) in the common earthworm. List the types of cell in humans that are diploid and state the number of chromosomes present in the nuclei. (Slide 45) ex. 3.3 U.1 One diploid nucleus divides by meiosis to produce four haploid nuclei. In humans we receive a set of 23 chromosomes from our mother and 23 chromosomes from our father. Therefore in each of our body cells we carry 46 chromosomes. This chromosome number is referred to as the diploid number of chromosomes or the 2n number of chromosomes. In humans the chromosomes are numbered from 1 to 22 plus X and Y.