A man has a mutation in a mitochondrial gene encoding a subunit of the ATP synthase complex. The mutation leads to a defective ATP synthase that is not able to synthesize ATP effectively, and this in turn leads to extreme muscle weakness in the affected individual. If this man has children, what is the likelihood that they will inherit this disease from him?
A. 75%
B. 100%
C. 0%
D. 50%
E. 25%
Answer: C
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Matthew has the inherited form of the eye cancer retinoblastoma (RB). His disease is caused by
A) a germline mutation in one RB allele and no mutation in the other allele. B) a somatic mutation in each copy of the RB gene in the same cell. C) a germline mutation in one RB allele and a somatic mutation in the other allele. D) a somatic mutation in one of the RB genes in the same area of the retina of one eye.
A population grows as long as its ____
a. total fertility rate exceeds the replacement fertility rate b. replacement fertility rate exceeds the total fertility rate c. total fertility rate equals the replacement rate d. total fertility rate is at least twice the replacement fertility rate e. total fertility rate falls below the average replacement fertility rate
Which of the listed statements describes the results of the following reaction? C6H12O6 + 6 O2 ? 6 CO2 + 6 H2O + Energy
A) C6H12O6 is oxidized and O2 is reduced. B) O2 is oxidized and H2O is reduced. C) CO2 is reduced and O2 is oxidized. D) O2 is reduced and CO2 is oxidized.
Genetic variability will not occur among offspring if crossing over does not occur during prophase I of meiosis.
a. true b. false