Humans, many mammals, insects and other animals have an XY sex-determination system. Humans have forty-six chromosomes, including two sex chromosomes, XX in … See more

The early stages of human differentiation appear to be quite similar to the same biological processes in other mammals and the interaction … See more

The first genes involved in the cascade of differentiation can differ between taxa and even between closely related species. For example: in zebrafish the first known gene to induce male differentiation is the amh gene, in tilapia it is tDmrt1, and in southern catfish it is foxl2. See more

The most intensively studied species, such as fruit flies, nematodes, and mice, reveal that evolutionarily, sex determination/differentiation systems are not wholly conserved and have evolved over time. Beyond the presence or absence of … See more

In many animals, differences in the exposure of a fetal brain to sex hormones are correlated with significant differences of brain structure and function, which correlate with adult … See more

• Human Sexual Differentiation by P. C. Sizonenko
• The Ciba Collection of Medical Illustrations: Vol.2, Reproductive System by Frank H. Netter, M.D. comparing female and male reproductive systems development and anatomy See more