Question

a dna sample was taken from mrs. big, the big’s daughter and the two men who claim to be the long lost son. which, if any, of the men are telling the truth?
○ daughter
○ son 1
○ son 2
○ son 3

Explanation:

To determine who is the long - lost son, we analyze the DNA banding patterns. A child's DNA bands should be a combination of the mother's bands. We compare the bands of each candidate (Daughter, Son 1, Son 2, Son 3) with the mother's bands.

• For the Daughter: Her bands match the mother's bands in a way consistent with maternal inheritance (since she is the mother's daughter, we can use her as a reference for maternal - derived bands).
• For Son 1: By comparing each of his bands, we find that they do not all align with the expected combination from the mother's bands.
• For Son 2: When we compare his DNA bands with the mother's bands, we see that his bands are a subset (or a matching combination) of the mother's bands, which is consistent with the inheritance pattern of a child (son) from the mother.
• Son 3 is not shown to have a banding pattern that matches the mother's bands in the required way.

Answer:

Son 2