Ectopic testes in the Norway rat.

  title={Ectopic testes in the Norway rat.},
  author={L G Gumbreck and Andrew J. Stanley and John E. Allison and E. Edward Peeples},
  journal={The Journal of experimental zoology},
  volume={230 1},
Animals with ectopic testes, some unilateral (on either the right or left side) and some bilateral, have appeared in a colony of King-Holtzman rats. This heritable defect has been given the genetic symbol "ect." Females carrying the gene are unaffected by it. When such females are bred to apparently normal males, they produce no ect offspring. Since 25% of their F2 generation carry the gene, it is assumed it is autosomal recessive. Studies involving selective breeding for males with ectopic… CONTINUE READING

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