Holstein cattle are normally black and white. A superbblack-and-white bull, Charlie, was purchased by a farmerfor $100,000. All the progeny sired by Charlie were normal in appearance. However, certain pairs of his progeny,when interbred, produced red-and-white progeny at afrequency of about 25 percent. Charlie was soon removedfrom the stud lists of the Holstein breeders. Use symbolsto explain precisely why.

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Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.