Two people (both heterozygotes) are able to taste a chemical substance called PTC. The ability to taste PTC is caused by a dominant allele (T). The inability to taste PTC is caused by a recessive allele (t). What proportion of their offspring would be expected to be heterozygous?
a. 3/4
b. 1/2
c. All
d. 1/4
e. 2/3
b
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The Hardy-Weinberg formula can be used to __________
a. predict approximate mating frequencies b. calculate genotype frequencies only if the population is small and mating is non-random c. reveal the presence of an evolutionary force at work in a population d. reveal the impact of blending inheritance on a population
Although there might be more than one species present at Hadar, the current consensus is that only one species is present, and that species is:
A. A. africanus B. P. boisei C. P. robustus D. A. afarensis
Both of the South African australopithecines species showed the hominids traits of bipedalism and short canines
Indicate whether the statement is true or false
The oldest fossils claimed to be contemporary humans, re-dated to about 300,000 years old, are found at:
A. the Klasies River mouth site in South Africa. B. the Jebel Irhoud site in North Africa. C. the Florisbad site in South Africa. D. the Omo 1 site in Ethiopia.