A)
Examine the two strands of DNA below. Which kind of mutation occurred?
Original strand: AGC GTA CCC TAC
New strand: AGC GTA ACC TAC
(1 point)
insertion
substitution
frameshift
deletion
Substitution
A) Millions of years ago, the ancestors of giraffes had short necks and used to eat leaves from
the bushes on the ground. A genetic mutation caused one giraffe's neck to be taller. This longnecked giraffe was able to eat leaves that were higher up on trees. This gave it an advantage
as it was able to access more food than other giraffes. Over millions of years, all of the giraffes
became long-necked. Which type of environmental factor caused this mutation to be
inherited? (1 point)
exercise requirement
food availability
polluted environment
radiation exposure
food availability
A) What is one way that a frameshift mutation could occur? (1 point)
three nucleotides are deleted
three nucleotides are inserted
two nucleotides are deleted
two nucleotides are substituted
two nucleotides are deleted
A) Which evidence best supports the claim that mutations are a source of inheritable genetic
variation? (1 point)
Mutations affect protein synthesis which impacts the way traits are expressed.
Mutations affect the way DNA is created through transcription.
Mutations can only happen during meiosis because genes are inherited.
Mutations are not inheritable from gametes because they are given from each parent