25. Colorblindness is a recessive, X-linked trait. In marriages between a man who is colorblind, and a woman who is a carrier, what percentage of the children can be expected to be sons who are color blind?
a. 50%
c. 100%
b. 75%
d. 25%

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.

some scientists like gregory adcock agree with thorne's theory of regional continuity.

others, like chris stringer and ian tattersall, believe thorne's results may be contaminated or misinterpreted.