Alabrador retriever needs to determine whether three male pups born to sadie, his black labrador retriever, are the offspring of sam, a yellow labrador retriever from another breeder. which process could the breeder use to determine if sam is the father of the pups? a. pcr analysisb. str analysisc. mtdna analysisd. y-chromosome analysis

The correct option is D.
Y chromosome analysis is a DNA technique that is used to research the paternal line. Females have two X chromosomes while males have one X chromosome and one Y chromosome. Offspring usually inherit one chromosome from the father and one from the mother. Sons that belong to one man usually have the same Y chromosome.Thus, the Y chromosome analysis is used to determine if the males in the family comes from the same father or paternal line. 

There would be one bar shorter than the bar for peaches.