人类染色体图示 its partner one duplicated chromosome 16171819202122 202122 Figure 7.2 (a)Photograph of the 46 chromosomes from a diploid cell of a human male.All are in the duplicated state.(b)By cutting apart and arranging the chromosomes according to length and shape. we see that there are two sets of 23 chromosomes.with all the chromosomes in one set having a partner or homologue,in the other.The partners don't pair at all during mitosis.but they pair up with each other during meiosis. ①人类染色体图示