Some offspring of the spotted snow skink, a lizard found in Tasmania, are born anatomically male but are genetically female. The change seems to happen more often at cooler temperatures
The researchers trapped 100 newly pregnant female spotted snow skinks at different altitudes in Tasmania and placed them in individual terrariums in their laboratory.
The researchers sexed each newborn skink by examining its sex organs in the first month of life. They also assigned genetic sexes by sequencing DNA taken from the animals’ tails.– meaning there were no male-to-female changes. However, 7 per cent of the 423 newborn skinks had male sex organs and XX chromosomes.These skinks were mostly found in litters in the cooler terrariums and born to females from lower altitudes.
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