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Figure 1 | Reproductive Biology and Endocrinology

Figure 1

From: Sex determination strategies in 2012: towards a common regulatory model?

Figure 1

Sex evolution as a response to environmental stress. Although the exact mechanisms may differ among species, the rationale remains the same, placing environment as the generator of natural selection and sex as a strategy to improve survival potential. Note that the term "induced response" doesn't imply direct functional change in response to the changing environment (as Jean Baptiste Lamarck suggested) but rather a promotion of phenotypes produced via random events (e.g. mutations).

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