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Home Austin Peay State University professor Dr. Mollie Cashner leads a genetics class on campus. (APSU) Austin Peay State University professor Dr. Mollie Cashner leads a genetics class on campus. (APSU)

Austin Peay State University professor Dr. Mollie Cashner leads a genetics class on campus. (APSU)

Austin Peay State University professor Dr. Mollie Cashner leads a genetics class on campus. (APSU)

Austin Peay State University professor Dr. Mollie Cashner leads a genetics class on campus. (APSU)

Clownfish are a good example of just how weird sex can be in the animal world. (Danny de Bruyne/FreeImages)