4. Summer squash color depends on the interaction between two genes. One gene (B) inhibits the production of color at another gene (A). If the production of color is not inhibited, then big “A” will produce yellow pigment, while little “a” produces green. Two white squash plants that are heterozygous for both genes are crossed. a. What type of inheritance is this? b. Complete the cross above. Identify what genotypes are white, yellow, and green. Include the expected phenotypic ratio (white:yellow:green).

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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.