BIOL 1104 Exam 4 Exam with correct
answers
mutation - correct answer -any change in DNA, ultimate source of all genetic variation
randomly - correct answer -mutation occurs ___ as mistakes in replication/crossing over or induced by
chemicals/radiation
bad - correct answer -effects of mutations are usually ____, sometimes not
allele - correct answer -mutation is typically rare, so alone it doesn't have much effect on ___
frequencies
substitution - correct answer -point mutation of genetic code in which one letter is changed for another
insertion - correct answer -a nucleotide/base pair is added into a genetic code
deletion - correct answer -a letter in the code of a nucleotide/base pair is removed
low - correct answer -rate of point mutation is ___ in human genome
delete - correct answer -radiation can ___ a portion of a chromosome
crossing over - correct answer -there can be an uneven exchange during chromosomal ___ ____,
resulting in duplication and deletion
atomic gardening - correct answer -1950s experimentation by govt. and plant breeders of irradiating
plants with gamma radiation in hope of producing useful mutations
- occasionally worked and produced dozens of useful varieties
