secondary sex characteristic : Definition, Usages, News and More
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secondary sex characteristic
n the genetically determined sex characteristics that are not functionally necessary for reproduction (pitch of the voice and body hair and musculature)
Sea lampreys turning up the heat Scientists found that male sea lampreys have a secondary sex characteristic that creates heat when they get near a female lamprey, something the females find hard to say no to.
June 28, 2013 - Science Daily