Grandma and granddaughter can undergo paternity testing. Here is a detailed explanation:
1. Theoretical basis: Paternity testing is a method of determining genetic relationships by analyzing genetic similarities between individuals, especially by comparing the similarity of DNA sequences. Due to their blood relationship, it is theoretically possible to determine the kinship between grandmother and granddaughter by comparing specific loci in their DNA sequences.
2. Technical feasibility: The paternity testing technology mainly adopts PCR technology and STR typing technology, which can accurately compare the genetic relationship between individuals. Although the grandmother and granddaughter have undergone genetic mixing between two generations, there is still some genetic similarity in their DNA sequences, so paternity testing can be conducted through professional medical institutions.
3. Practical operation: In practical operation, the grandmother and granddaughter need to go to a professional medical institution for DNA collection. The institution will use scientific methods to test the samples, compare the DNA sequences, and finally draw conclusions about the parent-child relationship. Due to factors such as genetic mixing, the results of paternity testing between grandparents and granddaughters may not be as accurate as those between parents and children. Therefore, caution should be exercised when interpreting the results.
A paternity test can be conducted between a grandmother and granddaughter, but the results may be influenced by factors such as genetic mixing and should be treated with caution.