CMD 175 Chapter Notes - Chapter 3: Hearing Loss, Mutation
22 Feb 2016
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Everyone here spoke sign language by nora groce. Deafness on the island occurred frequently in certain families, and not at all in others. This lowers the chances that deaf individuals became deaf through accident or sickness. There was only one instance of a deaf child born to a couple in which one partner"s family came from off-island. Unable to hear sounds in any frequency range. 85% of deaf islanders were born to two hearing parents. Nine deaf children whose sex was never listed. Begins with a single genetic mutation in an individual mutation does not show up in this individual they are a carrier. This individual can continue to pass down the mutant gene to any/all of their children. A descendant of these children mates with another descendant they can pass down the gene to their children. Their children can then be homozygous for the trait the child is deaf.
