Species DNA Sequence

Question

Species Number of Differences
from Human Sequence
Gorilla gorilla (gorilla) 1
Hylobates lar (gibbon) 3
Lemur catta (lemur) 30
Macaca mulatta (Rhesus monkey) 8
Saimiri sciureus (squirrel monkey) 11

Scientists use DNA sequencing to understand relationships among life on Earth. The chart illustrates differences between five species and humans. Although the DNA sequence of each may vary, what statement about all six organisms is true?
Responses
A The DNA sequences may vary but the amino acid sequences are identical.The DNA sequences may vary but the amino acid sequences are identical.
B The nitrogen bases in the nucleotides must also be different in each.The nitrogen bases in the nucleotides must also be different in each.
C The process in producing additional DNA, replication, is identical in all six.The process in producing additional DNA, replication, is identical in all six.
D The process of producing DNA, or replication, varies due to the differences in the DNA codes.

Answer 1

The correct response is:

C The process in producing additional DNA, replication, is identical in all six.

All living organisms, including the species listed and humans, utilize the same fundamental process of DNA replication. While the sequences themselves may differ, the mechanism by which DNA is replicated is conserved across all life forms.