Which of the following is least likely to be a cause of extinction?
a. asteroid impact
b. human activity
c. adaptive radiation
d. continental drift
e. climate change
ANSWER: c
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Which of the following is true about genetically modified foods?
a. They have been genetically altered by adding genes from an alternate organism. b. All of their genes have been sequenced, so their entire genome is known. c. Portions of their DNA have been manipulated, and genes have been moved to different chromosomes. d. They have undergone natural selection, and some important genes have been inserted
Gel electrophoresis is a technique used to separate a mixture of DNA fragments. During this process, large DNA fragments move longer distances than small DNA fragments when an electric current is applied
Indicate whether the statement is true or false
Scientific knowledge and reasoning can provide an empirically-based perspective to inform society's decision making. For example, a genetic counselor may discuss with parents the probability of them having a child with a genetic disease caused by a recessive allele. The counselor may use a Punnett square to illustrate the chances of having such a child. What is this genetic counselor using when constructing the Punnett square to advise these parents?
A) how certain traits are determined by more than one gene B) how mutations can affect the genetic information C) Mendel's law of segregation D) Mendel's law of independent assortment
Which cluster of terms accurately reflects the nature of DNA replication in prokaryotes?
A) fixed point of initiation, bidirectional, conservative B) random point of initiation, unidirectional, semiconservative C) fixed point of initiation, bidirectional, semiconservative D) fixed point of initiation, unidirectional, conservative E) random point of initiation, bidirectional, semiconservative