The '''testes''' (singular: '''testicle''') are the reproductive [[organs]]s that produce [[sperm]].<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia
+
The '''testes''' (singular: '''testicle''') are the reproductive [[organ]]s that produce [[sperm]].<ref>Wile, Dr. Jay L. ''Exploring Creation With Biology''. Apologia
Educational Ministries, Inc. 1998</ref> The XY [[sex chromosomes]] begin developing these sex glands in [[embryo]]s.
Educational Ministries, Inc. 1998</ref> The XY [[sex chromosomes]] begin developing these sex glands in [[embryo]]s.