Science. 1962 Oct 5;138(3536):36-7. doi: 10.1126/science.138.3536.36.
All males of the weevil Pissodes terminalis Hopp. are heterozygous for an autosomal fusion (cc --> C); all females are homozygous (CC). A mechanism is operative whereby union of like gametes gives rise to females and of unlike gametes gives rise to males, and union of half-alike gametes is totally excluded. The perpetuation of this sexual dimorphism of karyotypes following crossing implicates P. yosemite Hopk. in the hybrid origin of P. terminalis..
所有的象鼻虫 Pissodes terminalis Hopp. 雄性都是常染色体融合（cc --> C）的杂合子；所有雌性都是纯合子（CC）。有一种机制起作用，即相同配子的结合产生雌性，不同配子的结合产生雄性，而半相似配子的结合则完全被排除。这种染色体组型性二态性在杂交后的延续表明，P. yosemite Hopk. 在 P. terminalis 的杂种起源中起作用。
