Bio 171 Lecture 15 Guiding Questions and Answers 100% Verified
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Course
NUR BIOD 171
Institution
NUR BIOD 171
Bio 171 Lecture 15 Guiding Questions and Answers 100% Verified
Where and when (in what part of the cell) do mutations occur? What does it mean to say a mutation is neutral, deleterious, or beneficial? Which of these is most common?
Mutations can add, delete, or change nucleotides (base pairs, bp)...
Bio 171 Lecture 15 Guiding Questions
and Answers 100% Verified
Where and when (in what part of the cell) do mutations occur? What does it mean to
say a mutation is neutral, deleterious, or beneficial? Which of these is most common? -
answer Mutations can add, delete, or change nucleotides (base pairs, bp) in DNA
sequences
-Can affect one bp, a few bp, or a large region of chromosomes
-can alter coding or non-coding sequences
-If in a coding sequence, sometimes changes in amino acid sequence, sometimes not
Neutral mutations: no effect on fitness
Deleterious: reduces fitness
Beneficial: increases fitness
-Most common -> neutral
least common -> beneifical
What is the difference between a somatic versus a germ cell mutation? - answerGerm
cell: when mutations are passed onto next generation
Somatic cell: when mutations does not pass onto next generation
What is the difference between the effects of mutations in coding versus non-coding
regions? - answerIf in a coding sequence, sometimes changes in amino acid sequence,
sometimes not (non-coding)
What does it mean to say that a mutation is synonymous or non-synonymous? -
answerSynonymous mutations do not result in a change in amino acid
Ex: Codons for threonine -> as long as you have a A and C, you'll end up with
Threonine AA, so those mutations are synonymous (doesn't change AA)
Why do we call an insertion or deletion an "indel"? - answerYou can't really figure out
directionality at least not at first
How can you tell the difference between a missense and a nonsense mutation? -
answerA missense mutations results in a change in amino acid while a nonsense
mutation results to a stop codon
What are some examples of organisms that reproduce asexually? - answerMany fungi
and plants
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