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 children would be expected to have the tt genotype?
a. 3/4
b. 1/2
c. All
d. 1/4
e. 2/3
D
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__________ are incentives for people to move from one society to another
A. Demographic determinants B. Migration factors C. Push factors D. Pull factors
One of the major changes that the 20th century brought to the Inuit was:
a. Opportunities to enter the commercial fur trade and government employment. b. Almost complete extinction in the inland hunting grounds, forcing Inuit to live on the seacoast. c. Persecution by the government, leading to a reduction in Inuit numbers by more than 75 percent. d. Schooling opportunities that led most Inuit to migrate to more temperate climates. e. Almost complete extinction in native fisheries, forcing Inuit to move away from the coastline.
What is the role of vitamin D in human health, and how it is related to skin color?
What will be an ideal response?
Primatologists focus solely on studying primates in the wild
a. True b. False Indicate whether the statement is true or false