A certain type of congenital deafness in humans is caused by a rare autosomal (not X-linked) dominant gene.   (a)  In a mating involving a deaf man and a deaf woman (both heterozygous), would you expect all the children to be deaf?  Explain your answer.    (b) In a mating involving a deaf man and a deaf women (both heterozygous), could all the children have normal hearing?  Explain your answer.   (c) Another form of deafness is caused by a rare autosomal recessive gene.  In a mating involving a deaf man and a deaf woman, could some of the children have normal hearing?  Explain your answer.

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A:

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Q: 45

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Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.