Genetics: Example-Sheila
Sheila is a purebred Australian Shepherd who was born with no tail. Through selective mating/reproduction tails were bred out; the owners found that tails only got in the way of the dogs’ herding large animals such as cattle and sheep. So they took a page out of Gregor Mendel’s book and chose a male and female with the phenotype they wanted (no tails) and bred them to acquire the genotype (no tail). Through the science of biology’s selective mating/reproduction they were able to create a breed that was best suited for the job they wanted.