Question

Which evidence best supports the claim that mutations are a source of inheritable genetic variation?(1 point)
Responses

Mutations can only happen during meiosis because genes are inherited.
Mutations can only happen during meiosis because genes are inherited.

Mutations affect the way DNA is created through transcription.
Mutations affect the way DNA is created through transcription.

Mutations are not inheritable from gametes because they are given from each parent.
Mutations are not inheritable from gametes because they are given from each parent.

Mutations affect protein synthesis which impacts the way traits are expressed.

Answer 1

Mutations affect protein synthesis which impacts the way traits are expressed.

Answer 2

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)
Responses

frameshift
frameshift

substitution
substitution

deletion
deletion

insertion

Answer 3

substitution

Answer 4

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 long-necked 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)
Responses

exercise requirement
exercise requirement

food availability
food availability

radiation exposure
radiation exposure

polluted environment

Answer 5

food availability

Answer 6

What is one way that a frameshift mutation could occur? (1 point)
Responses

two nucleotides are deleted
two nucleotides are deleted

two nucleotides are substituted
two nucleotides are substituted

three nucleotides are deleted
three nucleotides are deleted

three nucleotides are inserted

Answer 7

three nucleotides are deleted