Given the sentence "THE FAT CAT ATE THE RED RAT," which of the following would represent a frameshift mutation?
A. THE FAC ATA TET HER EDR AT
B. THE CAT ATE THE RED RAT
C. THE FAT CAT ATE THE RED RAT
D. THE FAT RAT ATE THE RED CAT
Answer: A
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Sperm pass through several stages during their development. The earliest stage in which the cell
becomes haploid is the
a. sperm. b. spermatid. c. primary spermatocyte. d. secondary spermatocyte. e. spermatogonium.
Rising atmospheric concentrations of greenhouse gasses are causing which of the following two phenomena to occur?
A) global warming and global climate change B) pollution and depletion of the ozone layer C) smog and thermal inversion D) global warming and desertification E) heat and nutrient pollution
Repair of thymine dimers using light to split the dimers apart into separate monomers is called ________.
A. photoreparation B. photodedimerication C. photoreactivation D. None of the choices are correct.
An insect population that becomes resistant to a commonly used insecticide is an example of ________.
A. natural selection B. a founder effect C. disruptive selection D. genetic drift E. gene flow