Chromosomes of A. sp.1 aff. fraterculus. (A) Normal karyotype in a male that developed from an egg injected with buffer; (B) karyotype of a pseudomale that developed from an egg injected with tra-2 dsRNA; and (C) karyotype of a normal female.
Sarno et al. BMC Evolutionary Biology 2010 10:140 doi:10.1186/1471-2148-10-140