So identical twins share 100 percent of their environment and 100 percent of their genes, whereas non-identical twins share 100 percent of their environment, but just like any brother and sister, share only 50 percent of their genes.
Gemeni identici au 100% acelaşi mediu şi aceleaşi gene, pe când gemenii neidentici au 100% acelaşi mediu, dar ca orice frate şi soră, au doar 50% gene comune.