Microevolution represents:
A. changes that occur within a biological population that are easily observed
B. large-scale evolutionary changes that result in the origin of new species
C. changes that occur slowly over long periods of time
D. the processes that cannot be easily observed
Answer: A. changes that occur within a biological population that are easily observed
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Which of the following mRNA modifications are common in human cells?
A. 5' cap addition B. intron removal and exon joining C. 3' poly-A tail addition D. alternative splicing E. 5' cap addition, intron removal and exon joining, 3' poly-A tail addition and alternative splicing
Why does the author seem skeptical about the idea of in-vitro fertilization leading to the evolution of a “genius species?”
a. Scientists can’t test embryos to see if certain genes are expressed. b. Scientist can’t select which embryos to implant c. There are too many genes thought to influence IQ, and they don’t know enough about the genetic basis of intelligence to select for it. d. All of the above
In the U.S., the ____________________, a standardized set of thirteen STR alleles, is used to generate DNA profiles for legal cases
Fill in the blank(s) with correct word
For Mendel's law of segregation to occur, the alleles must be
a) on different loci (= locations) on different chromosomes. b) on a nonhomologous pair of chromosomes. c) on a homologous pair of chromosome at the same loci (= locations). d) at the same loci (= locations) on the same chromosome. e) at different loci (= locations) on the same chromosome.