Inbreeding and back-crossing explained

Backcrossing is a crossing of a hybrid with one of its parents or an individual genetically similar to its parent, to achieve offspring with a genetic identity closer to that of the parent. It is used in horticulture, animal breeding, and production of gene knockout organisms. Backcrossed hybrids are sometimes described with acronym “BC“; for example, an F1 hybrid crossed with one of its parents (or a genetically similar individual) can be termed a BC1 hybrid, and a further cross of the BC1 hybrid to the same parent (or a genetically similar individual) produces a BC2 hybrid. Problem: Rottweiler A is the father of Male Rotty B and of Female Rotty C . Rottweiler B and C have different unrelated but purebred Rotty Mothers . If Rottweiler B and C ( half siblings) have a pup . Is it true that pup will probably be 87.5 percent of Rottweiler A ( Grand father) , as far as genes are concerned. Producing a close replica of Rotty A ? #inbreeding #genetics #pedigreeanalysis #NikolaysGeneticsLessons #Genetics #Phenotype #Genotype #NarrowSenseHeritability #BroadSenseHeritability #breeding #selection #traits #breedingValue #population #estimatedBreedingValues #Prepotency #pedigree #DNA #quantitativeTrait #populationGenetics #pureLine #selectiveBreeding #ArtificialSelection #phenotypicTraits #breeds #Siamese #f1Savannah #f1Bengal #hybridCatSpecies #exoticPets