Question

An organism with a genome of about 50,000,000 base pairs is found to have faulty dna repair proteins, even though its dna polymerase still proofreads while replicating the dna. About how many point mutations would you expect in this genome after two rounds of dna replication?.

Answer 1

Based on the error rate of 1 in 10000 nucleotides, the number of point mutations is 1000 mutations.

What is DNA repair?

DNA repair is the method where errors which occur during DNA replication are corrected.

During DNA replication, the error rate is approximately 1 error for every 10,000 nucleotides copied.

This rate is reduced to only 1 error for every 1 billion nucleotides by DNA repair proteins.

Since the DNA repair proteins of the organism are faulty, the error rate is 1 in 10000.

Number of nucleotides copied = 2 × 50,000,000 = 100,000,00

Number of errors = 100,000,00/10,000 = 1000 point mutations

Therefore, the number of point mutations is 1000 mutations.

Learn more about DNA repair at: brainly.com/question/25895881