According to Hamilton's rule, _____
A) natural selection does not favor altruistic behavior that causes the death of the altruist
B) natural selection favors altruistic acts when the resulting benefit to the beneficiary, corrected for relatedness, exceeds the cost to the altruist
C) natural selection is more likely to favor altruistic behavior that benefits an offspring than altruistic behavior that benefits a sibling
D) the effects of kin selection are larger than the effects of direct natural selection on individuals
E) altruism is always reciprocal
Answer: B
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You have recently purchased a black angus bull named Maxwell, an advertised "pure-breeding" champion, for which you pay $1,000,000. You mate Max with several cows that are verified pure breeding black angus cows. Several years later, you mate different pairs of Max's offspring (F1 × F1) and find that, with certain pairings, approximately one fourth of the progeny are red (F2). If B = black and b
= red, what were the genotypes of the original cross (Maxwell × cow)? A) BB x BB B) Bb x BB C) Bb x Bb D) BB x bb E) bb x bb
Answer the following statements true (T) or false (F)
1.The zebra mussel and the gypsy moth both have reduced biodiversity in North America. 2.One important conservation tool used to restore native populations is to set aside an area and protect it from overexploitation, invasive species, and habitat destruction. 3.After nearing extinction in the 1960s, the bald eagle population is now about 10,000. 4.The greatest threat to the endangered great spotted kiwi of New Zealand is introduced predators. 5.Suspended matter that floats in the air, such as ash, soot, mold spores, and road dust, is known as particulates.
Constipation may lead to the development of
a. hemorrhoids. b. gallstones. c. duodenal ulcers. d. gastric ulcers. e. Barrett's esophagus.
A __________ is best used to demonstrate the linkage of two genes
a. monohybrid cross b. dihybrid cross c. monohybrid test cross d. two-allele test cross e. two-point test cross