Related Experiment Video
Updated: Jun 24, 2026

Ablation of a Single Cell From Eight-cell Embryos of the Amphipod Crustacean Parhyale hawaiensis
Published on: March 16, 2014
Gametogenesis and reproduction of seven species of pratylenchus
Abstract:
Three bisexual Pratylenchus species, P. penetrans, P. vulnus and P. coffeae have n = 5, 6 and 7 chromosomes, respectively, and reproduce by cross-fertilization. The monosexual P. scribneri comprises two chromosomal and reproductive forms. One has n = 6 chromosomes and reproduces by meiotic parthenogenesis, the other has a somatic chromosome number of approximately 25 and reproduces by mitotic parthenogenesis. The monosexual species P. zeae, P. brachyurus and P. neglectus have somatic chromosome numbers of approximately 21 to 26, 30 to 32, and 20, respectively, and reproduce by mitotic parthenogenesis. All mitotic parthenogenetic forms probably are polyploid. The phyletic relationships of some species are discussed briefly.
Related Concept Videos
Diversity of Protists I
Diversity of Protists IV
Asexual Reproduction
Diversity of Protists II
Understanding Species and Reproductive Barriers
Diversity of Protists III

