Andalusian chickens have one allele for white feathers and one allele for black feathers – they display codominance. When they are crossed the heterozygous offspring have black and white checkered feathers (BW). Pure chickens are either black (BB) or white (WW). Cross an Andalusian (heterozygous) chicken with a white chicken. Make a Punnett Square on a piece of paper that will help you answer the question. What percentage of the offspring will be black? What percentage of the offspring will be white? What percentage of the offspring will be andalusian?

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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.