Allele X codes for a cooperative behavior among full siblings. Recipients of this behavior receive a benefit of 7 fitness units and the behavior costs the donor 3 fitness units. Use Hamilton's rule to determine whether allele X will spread in the populati
What will be an ideal response?
ANS:
Hamilton's rule rb – c > 0; in this example r = 0.5, b = 7, c = 3; substituting the values produces 0.5 x 7 – 3 = 0.5 > 0; the allele will spread
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a. short-day b. long-day c. annual d. biennial e. perennial
Too little cortisol may lead to
a. hypoglycemia. b. diabetes. c. acromegaly. d. hyperglycemia. e. increased breakdown of fats.
Refer to the accompanying figure. Which structure is the blastocoel?
a. 1
b. 2
c. 3
d. 4
e. 5
Which statement about the genetic code is false?
A. Some amino acids are specified by more than one codon. B. Every codon codes for one amino acid. C. The genetic code is almost universal, but not quite. D. Nucleotides are always read in groups of three. E. There is no punctuation or spacing between codons.