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Which is true of mitochondrial DNA (mtDNA)? (Select all that apply) a. Replication relies upon...

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Which is true of mitochondrial DNA (mtDNA)? (Select all that apply)

a. Replication relies upon enzymes encoded by nuclear DNA even though mtDNA resides in the mitochondria of the cell.

b. mtDNA is located in the nucleus of the cell.

c. mtDNA is inherited from the father by his children (patrilineal inheritance).

d. Although rare, genetic disorders of mtDNA affect tissues in the neuromuscular system.

e. mtDNA is inherited from the mother by her children (matrilineal inheritance).

Mitochondrial DNA

Mitochondria are the organelles of eukaryotic cells where reactions of aerobic respiration occur and most of the cell's ATP is made. Mitochondria contain their own DNA, called mtDNA, in the form of small circular molecules that evolved from the circular genomes of the bacterial ancestors from which mitochondria descended. The mtDNA of different organisms varies in size from 11 kb in some animals to 1000 kb in some fungi, plants and protists. The mtDNA molecules of human cells are approximately 16,500 base pairs in size and encode 2 rRNAs, 22 tRNA, and 13 proteins that carry out functions in the mitochondria.

Answer and Explanation: 1

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Answer choices a, d, and e are true of mtDNA.

a. Replication relies upon enzymes encoded by nuclear DNA even though mtDNA resides in the mitochondria...

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Cytoplasmic & Mitochondrial Inheritance: Types & Impacts

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Chapter 8 / Lesson 4
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There are different types of cytoplasmic and mitochondrial inheritance, and they impose various impacts on offspring. Discover what extranuclear inheritance, vegetative segregation, uniparental inheritance, and biparental inheritance are.


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