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Study Reveals Environment Influences Mammal Sex Determination

6/7/2025

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Summary

Story summary

A groundbreaking study from Osaka University, led by Makoto Tachibana, uncovers that environmental factors play a significant role in determining sex in mammals, challenging the long-held notion that sex is solely dictated by chromosomes. The absence of the SRY gene on the Y chromosome, essential for testis development, can result in the formation of ovaries instead.

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Story summary

A groundbreaking study from Osaka University, led by Makoto Tachibana, uncovers that environmental factors play a significant role in determining sex in mammals, challenging the long-held notion that sex is solely dictated by chromosomes. The absence of the SRY gene on the Y chromosome, essential for testis development, can result in the formation of ovaries instead.