1. Sex reversal , which occurs in a fish's embryo stage, is not uncommon.2. Embryonic exposure in turtles to various PCBs causes a sex reversal . 3. Male to female sex reversal , however, does not occur because Leydig cells remain normal. 4. With no FGF9, there is a full sex reversal . 5. With no FGF2, there is a partial sex reversal . 6. Ultimately it causes female to male sex reversal . 7. The sex ratios are female biased because xenoestrogens interrupt gonadal configuration causing complete or partial sex reversal . 8. Mice lacking the homolog gene displayed a male-to-female sex reversal phenotype, which suggested a role in testicular embryogenesis. 9. And they say the sex reversal may help explain some of the difficulties Columbia salmon have had in reproducing. 10. They seem to exhibit partial protandric sex reversal in that smaller individuals are mostly males but females predominate among larger individuals.
