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Bio 171 Lecture 15 Guiding Questions and Answers 100% Verified
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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)...

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  • October 2, 2024
  • 4
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • bio 171 lecture 15 guiding questions and answers 1
  • where and when in what part of the cell do mutat
  • what is the difference between a somatic versus a
  • what is the difference between the effects of muta

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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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