During development of the free-living
adults of the
human parasitic nematode
Strongyloides stercoralis,
cells in certain
tissues grow by
endoreplication in which rounds of
DNA replication occur without
cell or
nuclear division. The
DNA content of individual nuclei was measured by microdensitometry of Feulgenstained preparations. In
females, some ovarian
cells have up to 800 times the
haploid DNA content (800C). In
males, some
cells of the
testis have up to 100C. Intestinal
cells in both sexes have up to 16C, whereas most other somatic
cells have 2C (AU)