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When DNA replication occurs before meiosis, the original DNA strand CAG TGT TTA TAG is copied into complementary strand GTC ACA GGC ATC. What type of mutation has occurred? Responses A deletiondeletion B insertioninsertion C inversioninversion D substitutionsubstitution Question 2 PART B When DNA replication occurs before meiosis, the original DNA strand GTC ACA GGC ATC is copied into complementary strand CAG CCG TAG. What type of mutation has occurred?? Responses A deletiondeletion B insertioninsertion C inversioninversion D translocation

1 answer

To analyze the mutations in the given strands:

Question 1:

Original DNA strand: CAG TGT TTA TAG
Complementary strand (from your input): GTC ACA GGC ATC

  1. Let's look at the original and the complementary to verify:
    • Original: CAG TGT TTA TAG
    • Expected complementary: GTC ACA AAT ATC (based on base pairing rules: A=T, C=G)
    • Observed complementary: GTC ACA GGC ATC

From this, we can see that the observed complementary sequence differs from what is expected due to the GGC being in the place of AAT. It appears that "TTT" was mutated to "GGC".

This indicates a substitution mutation where one or more bases were replaced by others. Answer for Question 1: D substitution

Question 2:

Original DNA strand: GTC ACA GGC ATC
Complementary strand (from your input): CAG CCG TAG

Now let's check this one:

  1. Original: GTC ACA GGC ATC
  2. Expected complementary: CAG TGT CCG TAG (as G goes to C, T goes to A, and A goes to T based on base pairing)
  3. Observed complementary: CAG CCG TAG

It appears that the "TGT" section (that should be here based on the original) has been altered. Specifically, the "TGT" has been replaced with "CCG" in the complementary strand.

This also suggests a substitution mutation, where bases were changed. Answer for Question 2: D substitution

The rest of the options (deletion, insertion, inversion, and translocation) do not fit the nature of the changes discussed above.