Homorhabdic

heterosis n. [Gr. heteros, different; -sis, process of] Selective superiority of heterozygotes; hybrid vigor.

heterosomal a. [Gr. heteros, different; soma, body] Chromosomal structural changes involving two or more nonho-mologous chromosomes.

heterosome n. [Gr. heteros, different; soma, body] Sex chromosome; a heterochromosome.

heterostrophic a. [Gr. heteros, different; strophe, turn] (MOLL: Gastropoda) Pertaining to a protoconch when the whorls appear to be coiled in the opposite direction to those of the teloconch.

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