Children with hereditary retinoblastoma inherit a chromosome 13 from one parent that has which of the following defects in the RB gene?
A) insertion
B) duplication
C) inversion
D) point mutation
E) deletion
Answer: E
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As many bacterial molecular sequences evolve quickly and/or continuously, creating a bacterial phylogenetic tree based on molecular sequences can be difficult
A. true B. false
Which symptom best indicates anaerobic cellular respiration in human muscle cells?
A. pain B. sweating C. redness D. cooling of the skin
Which of the following outcomes is more likely to occur in an organism undergoing sexual reproduction than in an organism undergoing asexual reproduction?
a. a rapid increase in population size b. a decrease in genetic diversity c. an increase in genetic diversity d. a rapid colonization of new niches
Genetic analysis of longevity in several species has shown that observed longevity in natural populations does not represent the maximum possible longevity that could have been attained via natural selection. What are the implications of this finding?
a. Traits that are responsible for longevity are not under selection. b. There are constraints on the ability of selection to stop the breakdown of an organism's body. c. Fitness is maximized at an optimal life span that is lower than the maximum life span. d. Late-acting mutations are rapidly purged from populations.