Fat mice can be produced by two independent genes. The "oo" genotype generates a fat and sterile mouse, called obese; its dominant "O" allele results in normal growth. The recessive "aa" genotype also produces a fat, sterile mouse called adipose, while its dominant allele causes normal growth. What phenotypic ratios of fat versus normal mice can we expect in F1, being the parents of the OoAa genotype?

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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.