A healthy woman has two previous pregnancies that ended early because the fetuses developed a severe mtDNA disorder. In order to increase the chance of having a healthy baby without a mtDNA disorder, her medical team recommends a new approach for the woman. They recommend:

A, B and C are linked genes. Recombination between A and B is 3%; between A and C is 6%; and between B and C is 9%. What is the order of these genes on the chromosome?

Jane is a patient. Her brother Greg has neuronal ceroid lipofuscinosis, also known as Batten disease. It is autosomal recessive, and its symptoms include vision loss, loss of coordination, dementia and seizures. Jane is healthy as are her parents and grandparents. Jane is thinking of having children. She wants to know the percent chance that her child would be a carrier for Batten Disease (in other words, the probability that Jane is a carrier and that her child will inherit the recessive allele). Since Batten disease is very rare, we will assume that the father of Jane’s child is not affected nor a carrier.

How could an individual have a trisomy?

A patient is experiencing extreme fatigue, muscle weakness, and poor eyesight. The symptoms are consistent with a mitochondrial disorder, but the patient’s mother is healthy. Select a plausible explanation(s). Choose all that apply.

A heart muscle cell in a dog has a total of 78 chromosomes. How many chromosomes per daughter cell following mitosis?

Match the glossary term with the correct definition:

This neurotransmitter plays a role in schizophrenia and Parkinson’s disease.

A decline in the production of the neurotransmitter GABA is likely to result in an increase in:

The image shows a noninvasive brain-imaging technique that produces highly detailed images of the body’s internal structures, including the brain. What is the name of this brain-imaging technique?