Fruit flies having one allele for curly wings (Cy) and one allele for normal wings (Cy+) develp curly wings.  Fruit flies homozygous for normal wings (Cy+) develop normal wings. When two curly-winged flies were crossed, 204 curly-winged and 98 normal-winged flies.  In fact, all crosses between curly-winged flies produce nearly the same curly-winged to normal-winged ratio.  How would you explain these results?   The Cy allele is epistatic to the Cy+ allele. The Cy+ allelle shows partial dominance over the Cy allele. The Cy allele is dominant for the curly phenotype and is lethal when homozygous.  The Cy+ allele is dominant over the Cy allele and is lethal when homozygous.    The Cy+ and Cy alles are co-dominant.

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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.