22q11.2 deletion syndrome is caused by the deletion of a small section of chromosome 22. It results in a cleft palate, heart defects, autoimmune disorders, and more. The symptoms vary wildly and can be accompanied by learning disabilities and mental illness. Cystic fibrosis is caused by a point deletion.
The melody of Happy Birthday to You comes from the song  Good Morning to All , which has been attributed to American siblings Patty Hill and Mildred J. Hill in 1893, although the claim that the sisters composed the tune is disputed.
Who sang the Happy Days theme song? Seasons 1 and 2 of the series used a version of Rock Around the Clock by Bill Haley & His Comets as the opening theme song. The show's closing theme song in season 1 was aâ¦ fragment from Happy Days.. This version was performed by Jimmy Haas on lead vocals, Ron Hicklin of the Ron Hicklin Singers, Stan Farber, Jerry Whitman, and Gary Garrett on backing vocals, and studio musicians.