Question

During dna replication in a bacterium a g is mistakenly inserted into the newly-synthesized dna strand opposite a t in the template dna strand. if this mistake is not repaired before the next round of dna replication, what mutation will eventually result?

Answer 1

The mutation will be one base substitution mutation.

Step-by-step explanation:

• In the newly forming strand only one G is inserted mistakenly.
• As we know DNA replication is a semi conservative model.
• In which two strands of double stranded DNA will be two separate templates for the two newly strands of DNA.
• As one of the strand has one wrong nucleotide in its sequence. As if it is not repaired the substitution will become the part of newly formed strand formed from this mutated strand.
• And this mutation will pass onto next generation with half correct DNA and half wrong DNA.

Answer 2

The type of mutation that will eventually occur is A TO G BASE SUBSTITUTION.
In this type of mutation, what will happen is that, in all the points where adenine base is suppose to be inserted, it is the guanine base that will be inserted there. This is an example of base substitution error in DNA replication.