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Mitochondrial Inheritance · Acedra
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Mitochondrial Inheritance
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So, the answer to this question should be, the middle three children should be shaded in as affected. Now think about this for a second if you had trouble; maternal inheritance means it can only be inherited from the mother. Why is that? You only get mitochondria from the mother. So, in this case the affected mother and unaffected father all of the children were affected. Both the males and the females, because they all got their mitochondria from the mother. So in this case over here the male
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is affected. Great. So now he's going to have his own three children, but does he pass mitochondria down to children? No, he doesn't. Only the mother does that, so they wouldn't be affected. Same thing over here. Male was affected but he doesn't pass his mitochondria down. The mother was unaffected in these cases so they'g going to be unaffected children for this particular trait. On the other hand the females in this row were effected and since they passed their mitochondria down
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to the next generation all their children are affected as well
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