Chromosomes

Dr. Varkey said the complaint stemmed from his teaching that human biological sex is determined by the 23rd pair of chromosomes and that XX chromosomes are female and XY chromosomes are male, that sex must be between a man and a woman for the perpetuation of the species, and that life begins at conception.

The birth of baby mice made from eggs grown in a lab has sparked an ethical debate over whether the technique should ever be offered for humans by fertility clinics.
The experiment is a step up (or down, depending on how you look at it) from creating human organs from stem cells, which scientists at the University of Edinburgh successfully did for the first time in 2014.