Sequencing the dog genome is currently a high priority for genomics researchers. What insights do you think can be gained about the evolutionary process by analyzing the genome of dogs?
What will be an ideal response?
Dogs are diversified into a multitude of breeds, many with striking morphological and behavioral differences. Yet, all dogs are the same species, and their DNA differs only minutely. Comparison of the genomes of different dog breeds may therefore shed light on which genetic elements are responsible for the radically different developmental pathways of different dog breeds–a process that may represent a microcosm of species-level differentiation over evolutionary time.
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Members of the genus Micrococcus usually exist as ________.
A. irregular clusters B. pairs C. tetrads D. All of the choices are correct.
In humans, XO individuals are females with Turner syndrome and XXY individuals are males with Klinefelter syndrome. Which of the following events cannot give rise to a Klinefelter male?
A) nondisjunction at meiosis I in the mother B) nondisjunction at meiosis II in the mother C) nondisjunction at meiosis I in the father D) nondisjunction at meiosis II in the father E) All of the choices could give rise to a Klinefelter male.
Bile:
a. has no effect on digestion b. helps in the digestion of fats c. helps in the digestion of carbohydrates d. helps in the digestion of proteins e. lowers the pH in the intestine
Which of these events is an example of indirect contact transmission?
A) A person develops plague from a flea bite. B) Vacationers develop shigellosis, caused by the intestinal pathogen Shigella spp., after drinking contaminated water. C) Tuberculosis is spread from one person to another after traveling through the air for several meters. D) A person drinks from a cup used by another individual. E) Several people become infected with Listeria after consuming contaminated ice cream.