The ____________________ provides a means of measuring allele frequencies in the population. Fill in the blank(s) with the appropriate word(s)
ANS: Hardy-Weinberg law
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Amanda was successfully treated for the P. aeruginosa infection, but on a subsequent visit to
the hospital, she was infected again. With this second infection, her immune system would ____________________.
a. respond more quickly to the antigen b. immediately start to produce memory cells c. have a reduced response due to recognizing the antigen d. not be able to fight off the infection
Pigment can be found in several layers of the epidermis. In which layers would you expect to find the cells that produce melanin?
a. stratum granulosum b. stratum lucidum c. stratum basale d. stratum spinosum
What legal restrictions on the use of PGD are in place in the United States?
A. It has been banned across the board. B. It can only be used to prevent implantation if the disease diagnosed has a 100 percent chance of occurring with the genotype revealed. C. It cannot be used for sex selection. D. It cannot be used for screening embryos to be tissue donors. E. None of these are legal restrictions currently in place in the United States.
In a species of desert lizard, only females are known to exist. When two females court prior to reproduction, it is necessary for one lizard to assume the posture of a male to stimulate the other female to ovulate. This is a case of
A. bisexuality. B. hermaphroditism. C. angiogenesis. D. parthenogenesis.