Herpetological
www.deadfishherpetological.com
Genetic and Non-Genetic
Sex-Determination Factors
- Chromosomal (Gametogenic) Sex Determination
- Parthenogenesis: It's a Girl!...well, usually
- Natural Gender Reassignment (sex reversal)
- Temperature-Dependent Sex Determination
incubation temperature of the eggs at critical times in hormone production and development. There are
three identified modes of TSD:
Pattern 1a: males are produced at low temperatures and females produced at higher temperatures
Pattern 1b: females are produced at low temperatures and males produced at higher temperatures
Pattern 2: females are produced at low temperatures, males at intermediate temperatures and females
again produced at higher temperatures (there are no known temperatures that don't produce
females for most known species that utilize pattern 2 TSD
believed to utilize pattern 1b actually employ
pattern 2. Originally observed in Agama
agama--Red Headed Rock Agama.
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