The development of the penis in an embryo is controlled by some of the same Hox genes in particular HOXA13 and HOXD13  as those that control the development of the limbs. Categories : Andrology Human size Human penis. New England Journal of Medicine. During the Renaissance , some men in Europe began to wear codpieces , which accentuated their genitals. Perceptions of penis size are culture-specific.
Victoria. Age: 32.
For example, a group of band students would not be representative of all students at the middle school, and thus would constitute a biased sample if the intent was to generalize to all middle school students.
June. Age: 31.
Human penis size
The belief that penis size varies according to race is not supported by scientific evidence. Archived from the original on 8 September Proceedings of the National Academy of Sciences.