Question

b the dna fingerprints were made from the blood samples taken from a puppy and three possible sires in an attempt to determine the puppys pedigree. according to the profile below, which sire is most likely the father of this puppy?
how do you know?

Explanation:

DNA fingerprinting for parentage works because an offspring inherits half its DNA from each parent. Every band in the puppy's DNA profile must match a band from either the mother (not shown) or the father. Comparing the puppy's bands to each sire:

• Sire A has multiple bands that do not match the puppy's profile, and lacks several bands present in the puppy.
• Sire B has some matching bands, but also has bands not found in the puppy and is missing key puppy bands.
• Sire C has a matching band for every band in the puppy's profile, meaning all of the puppy's DNA fragments can be accounted for by inheriting from Sire C (and the mother).

Answer:

1. The sire most likely to be the father is Sire C.
2. Every band in the puppy's DNA fingerprint matches a corresponding band in Sire C's profile, which fits the genetic rule that offspring inherit half their DNA from their father.