In a mating between individuals with the genotypes IAIB × ii, what percentage of the offspring are expected to have the O blood type?
A) 25%
B) 100%
C) 0%
D) 75%
E) 50%
Answer: C
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Which statement about the genetic code is false?
A. There is no punctuation or spacing between codons. B. Nucleotides are always read in groups of three. C. Every codon codes for one amino acid. D. Some amino acids are specified by more than one codon. E. The genetic code is almost universal, but not quite.
Kisspeptin is a protein that in humans has an important role in initiating secretion of the releasing factor gonadotropin-releasing hormone (GnRH)
Endocrinologists are finding that the protein kisspeptin and its receptor are central to sexual maturation at puberty. If kisspeptin directs the release of GnRH, you would expect that the receptors for kisspeptin will be found in cells of the: A. anterior pituitary. B. posterior pituitary. C. hypothalamus. D. gonads.
Evolutionary studies that use comparative morphology to analyze the structures of related organisms are primarily
based on comparisons of homologous traits.
a. True b. False
Which of the following does not contribute to the infectious ability of prions?
A. prion proteins can enter the bloodstream B. prion proteins are deposited as aggregates C. prion diseases progress slowly D. prion proteins can induce the misfolding of normal proteins E. prion proteins are not digested