Question

A biologist analyzes the DNA sequences of one gene in three different primates . The biologist finds that primates A and B have almost exactly the same DNA sequences for that gene. The DNA sequences in primate C are significantly different from those of A and B. This information allows the biologist to infer that:________

Answer 1

The question is incomplete as it does not have the option which are:

• primates A and B are more closely related to each other than either is to primate C.
• all three primates appeared on Earth at about the same time.
• either primate A or primate B must be a direct ancestor of primate C.
• primate C must have been the ancestor of both primate A and primate B.

Answer:

Primates A and B are more closely related to each other than either is to primate C.

Explanation:

In the given question, on the basis of the given information, it can be predicted that the Primate A and B are more closely related to C as the DNA sequences of these two primates are almost similar. The similarity of the sequence suggests that these primates have descended or diverged from a common ancestor.

The DNA sequence of C is different from both A and B which shows that both A and B are different from the C.

Thus, the selected option is the correct answer.

Answer 2

Answer:

The DNA sequencing is important for the determination of the evolutionary relationship with the organisms. The ancestory and descendants can also be identified by DNA sequencing.

Three primates A,B and C DNA sequences has been identified. It is given that primates A and B has same sequence and they are more closely related with each other. The primates C is unique and do not share relation with the primates A and B.