File : Temperature dependent sex determination . png | thumb | Some reptiles use incubation temperatures to determine their sex.
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Like many turtles, terrapin have temperature dependent sex determination, meaning that the sex of hatchlings is the result of incubation temperature.
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In many cold-blooded reptiles, which preceded mammals in evolution history, sex of the offspring is determined by the egg incubation temperature.
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Research showed that incubation temperatures above 30 degrees Celcius produce mostly females while temperatures below 28 degrees Celcius produce mostly males.
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Dr . Crews demonstrated that incubation temperature acts on a group of genes homologous to those in mammals that affect gonadal differentiation.
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File : Different case of temperature dependent sex determination . png | thumb | Some reptiles use incubation temperatures to determine sex.
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In many reptiles the sex of the offspring depends on the incubation temperature of the egg, not on genotype as in mammals.
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Some sociosexual behaviors and brain measures are affected directly by incubation temperature, whereas both incubation temperature as well as gonadal sex influences others.
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Some sociosexual behaviors and brain measures are affected directly by incubation temperature, whereas both incubation temperature as well as gonadal sex influences others.
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The team discovered that a foreign plant species shading croc nests actually lowers the incubation temperature, resulting in eggs of only one sex.
