Population geneticists are interested in the forces that change the ____________________ of genes in a population. Fill in the blank(s) with the appropriate word(s)
ANSWER: frequency
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The vast majority of proteins expressed early in an animal's development
a. are translated from preexisting mRNAs present in the unfertilized egg. b. are translated from preexisting mRNAs delivered by the sperm that fertilized an egg. c. are translated from mRNAs that were transcribed from the zygote's DNA in the first three rounds of cell division. d. are transcribed and translated from the unfertilized egg's DNA postfertilization. e. were present as inactive proteins in the unfertilized egg.
Although birds, fish, mammals, reptiles and amphibians are different, evidence of their evolutionary
links is provided by a. chemical analysis. b. comparison of adult body forms. c. comparison of ways in which their embryos develop. d. time of gestation. e. comparing life expectancies.
The most radiosensitive macromolecule is _____.
a) protein b) DNA c) mRNA d) tRNA
The evolutionary origin of the v-src gene is most likely
a) A viral replication gene that mutated and gained cancer-causing properties b) A stretch of non-coding DNA in bird genome where ancient viruses integrated c) A bacterial gene that turned into a viral gene d) A normal bird gene that became part of a viral genome and mutated