For decades scientists have been perplexed by different circumstances surrounding families with rare, early-onset auditory neuropathy (deafness). In some families, parents and grandparents of the proband have normal hearing, while in other families, a number of affected (deaf) family members are scattered throughout the pedigree, appearing in every generation. Assuming a genetic cause for each case, offer a reasonable explanation for the genetic origin of such deafness in the two types of families.

Human Biology (MindTap Course List)
11th Edition
ISBN:9781305112100
Author:Cecie Starr, Beverly McMillan
Publisher:Cecie Starr, Beverly McMillan
Chapter20: Chromosomes And Human Genetics
Section: Chapter Questions
Problem 7CT: The following pedigree shows the pattern of inheritance of red-green color blindness in a family....
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For decades scientists have been perplexed by different circumstances
surrounding families with rare, early-onset auditory
neuropathy (deafness). In some families, parents and grandparents
of the proband have normal hearing, while in other families,
a number of affected (deaf) family members are scattered
throughout the pedigree, appearing in every generation. Assuming
a genetic cause for each case, offer a reasonable explanation
for the genetic origin of such deafness in the two types of
families.

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