Researchers pinpoint when temperature determines sex and uncover early genetic changes guiding male or female development in ...

In reptiles, a simple temperature change can determine whether an egg develops into a male or female. This process is ...

How does a tiny cluster of cells become an embryo with a head, trunk, and tail? And how do thousands of genes coordinate this development? A new imaging method makes it possible to visualize the ...

Descriptions of the embryo go back at least to the time of Aristotle, but it has only been since the late 19 th century and early 20 th century that advances in experimental approaches allowed ...