balanced lethals
Heterozygotes in which a gene mutation or chromosome structural change occurs that blocks normal development and is fatal before sexual maturity; see lethal factor.

Online Dictionary of Invertebrate Zoology. . 2005.

Look at other dictionaries:

  • balanced lethal — noun : a true breeding heterozygous organism maintained in a stable state through the existence of different lethals on each of a pair of homologous chromosomes and resulting in loss of all homozygotes …   Useful english dictionary

  • Hermann Joseph Muller — Infobox Scientist name = Hermann Joseph Muller image size = 180px caption = birth date = December 21 1890 birth place = New York City, New York, USA death date = April 5 1967 death place = Indianapolis, Indiana, USA nationality = United States… …   Wikipedia

  • lethal factor — see balanced lethals …   Dictionary of invertebrate zoology

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