Hutchinson-Gilford Progeria Syndrome, Fragile X syndrome, Triple X syndrome, Tuberous Sclerosis (TSC), Trisonomy 18 also known as Edwards syndrome, Trisomy 13 also known as Patau syndrome, Laurence Moon Bardet Biedl syndrome (LMBBS), Cri Du Chat (CDC), Tay-Sachs disease, Bloom's Syndrome, Noonan syndrome, Williams syndrome, and Turner syndrome are some examples.
1. Fragile X Syndrome occurs when x chromosome is weak or destroyed
2. Tuberous Sclerosis or tsc
3. Trisonomy 18 occurs due to third number of chromosome