Y chromosome
One of the two sex chromosomes, X and Y.
A sex chromosome in organisms (such as mammals) in which males are heterogametic (XY). See also: X chromosome, sex chromosome.
Young Earth creationism
The belief that the universe came into being only a few thousand years ago. Most young Earth creationists interpret the Bible literally, including not just the special, separate creation of human beings and all other species, but the historicity of Noah’s flood.

