Transgenic mice engineered to contain the mutant versions of the huntingtin gene with various numbers of _____________________ repeats have phenotypes similar to humans affected by Huntington disease
Fill in the blank(s) with correct word
CAG
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Marine mammals, because of the energy demands of being homeothermic, expend about ____ times as much energy as other marine organisms
a. 5 b. 10 c. 15 d. 20 e. 25
Crossing over is facilitated by a ____ orientation between homologous chromosomes.
A. tightly angled B. separated, perpendicular C. tight, perpendicular D. separated, parallel E. tight, parallel
Which of the following statements is false regarding mammals?
A. Mammals’ lower jaw consists of a single bone. B. Mammals have distinctive skeletal and dental traits. C. The mammalian heart is three-chambered. D. Mammals are animals in which females nourish their offspring with milk that they secrete from mammary glands. E. Mammals also include the only animals that sweat.
Mitochondria share all the following features with bacteria except
A) 80S ribosomes. B) 70S and 80S ribosomes. C) 70S ribosomes. D) linear DNA. E) linear DNA and 80S ribosomes.