Lethal Alleles​ are gene mutations that hamper the survival of the organism. they are able to current as different genetic Conditions which can be deadly to the person. there are several programs you could consider https://www.bing.com/maps?osid=ff1f54cd-8977-4a6f-846a-3b27f56a92e7&cp=-33.835934~150.957577&lvl=16&pi=0&imgid=b44a2691-fcbc-4efd-97be-fd7ec90e7d67&v=2&sV=2&form=S00027