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Search Results for mutations - All Grades

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Grade 9 Evolution
A mutation in a species is an adaptation if the mutation
  1. weakens the species.
  2. makes the species attract mates.
  3. changes the species permanently.
  4. improves Darwinian fitness (the ability to reproduce).
Grade 10 DNA, RNA, and Genetics
Down syndrome is caused by a type of
  1. physical mutation.
  2. mental mutation.
  3. gene mutation.
  4. chromosomal mutation.
Grade 10 DNA, RNA, and Genetics
What mutation causes change in chromosomes?
  1. chromosomal mutation
  2. gene mutation
  3. physical mutation
  4. mental mutation
Grade 10 DNA, RNA, and Genetics
What kind of mutation has occurred if the original sequence of nitrogen bases was CCGGTAC and the new sequence is CCGGTTAC?
  1. deletion mutation
  2. duplication mutation
  3. inversion mutation
  4. translocation mutation
Grade 9 DNA, RNA, and Genetics
A point mutation that changes a codon specifying an amino acid into a stop codon is called a
  1. missense mutation.
  2. nonsense mutation.
  3. frameshift mutation.
  4. deletion mutation.
Grade 10 DNA, RNA, and Genetics
What type of mutation causes change in the DNA sequence?
  1. physical mutation
  2. gene mutation
  3. chromosomal mutation
  4. mental mutation
Grade 10 DNA, RNA, and Genetics
What type of mutation has occurred if the original sequence of DNA is CCC but is now CCA?
  1. frameshift mutation
  2. deletion mutation
  3. insertion mutation
  4. substitution mutation
College DNA, RNA, and Genetics
Which of the following mutation causes a stop codon to occur in the middle of a gene.
  1. Silent mutation
  2. Missense mutation
  3. Nonsense mutation
  4. Frameshift mutation
  5. No mutation causes a stop codon
Grade 10 Evolution
Unlike a lethal mutation, a neutral mutation
  1. does not change the sequence of bases in DNA.
  2. is affected by natural selection.
  3. will occasionally be favored by a change in the environment.
  4. has been altering phenotypes for billions of years.
College DNA, RNA, and Genetics
What is the term for mutations that cause loss of a chromosome?
  1. Structural mutations
  2. Chromosome mutations
  3. Single-gene mutations
  4. Genome mutations
Grade 10 DNA, RNA, and Genetics
Sickle cell anemia is caused by what type of mutation?
  1. point mutation
  2. chromosomal mutation
  3. frameshift mutation
  4. translocation
Grade 11 DNA, RNA, and Genetics
Mutations are a source of
  1. genetic equilibrium.
  2. disruptive selection.
  3. speciation.
  4. genetic variation.
Grade 9 DNA, RNA, and Genetics
Most mutations                              .
  1. have no effect on an organism
  2. are fatal to an organism
  3. are helpful to an organism
  4. are harmful to an organism
College DNA, RNA, and Genetics
A point mutation that changes a codon specifying an amino acid into a stop codon is called a what?
  1. missense mutation
  2. nonsense mutation
  3. deletion mutation
  4. none of the above
Grade 10 DNA, RNA, and Genetics
Grade 9 DNA, RNA, and Genetics
Mutations can be
  1. neutral.
  2. beneficial.
  3. harmful.
  4. all of the above
Grade 10 DNA, RNA, and Genetics
Mutations are a source of
  1. genetic equilibrium.
  2. genetic variation.
  3. disruptive selection.
  4. speciation.
Grade 9 DNA, RNA, and Genetics
Mutations are always
  1. harmful.
  2. helpful.
  3. deleterious.
  4. random.
Grade 10 DNA, RNA, and Genetics
Grade 10 DNA, RNA, and Genetics
What cause mutations?
  1. amino acids
  2. exons
  3. mutagens
  4. mRNA
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