Lisa has a rare genetic defect that causes acute sun-sensitivity. Her mother has the defect, but her father does not. All
of Lisa’s siblings, two brothers and a sister, are also affected. All four siblings are married, but none of their spouses has
the mutant gene. Draw a pedigree for this family. Identify and explain the most likely mode of transmission for this
disorderWhat will be an ideal response?
The most likely mode of transmission for this disorder is via maternal mitochondria.
Mitochondria carry DNA molecules that encode information for 37 mitochondrial genes.
Mitochondria are transmitted from mothers to all their children through the cytoplasm of the
egg (sperm do not contribute cytoplasm or mitochondria at fertilization). As a result, genetic
disorders caused by mutations in mitochondria are maternally inherited and produce a
distinctive pattern of inheritance. All the children of affected females are affected. Affected
females will transmit the disorder to all their offspring, but affected males cannot transmit the
mutations to any of their children.
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Under what circumstance would your body experience an increase in erythropoietin secretion?
A. if your hematocrit is elevated above normal levels B. if you just moved from New York City to start training for a marathon in the 'Mile-High' city of Denver, Colorado C. after drinking 5 liters of water in just 2 hours D. if you are suffering from hypertension E. if you are suffering from dehydration Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about erythropoietin? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
During the cell cycle, MPF activity
A) peaks in S and decreases in G2. B) peaks in G2 and decreases in G1. C) peaks in M and decrease in M. D) peaks in M and decreases at the restriction point. E) peaks in G1 and decreases in G2.
When antibodies or other substances in serum cross-react with the test reagents, a false positive result can occur.
a. true b. false
It is FALSE that
A. coenzymes are needed in many reactions to enable the enzyme to function as a catalyst. B. water-soluble vitamins like thiamine, riboflavin, and niacin can be converted to coenzymes. C. coenzymes are nonprotein molecules. D. coenzymes remain unchanged during a reaction.