3) A wild type fruit fly (dihybrid for gray body color and normal wings) is mated with a black fly with vestigial wings. Determine the expected phenotypic ratio resulting from this cross if we initially assume the alleles for these traits are unlinked and exhibit complete dominance. The offspring of the mating described above actually exhibited the following phenotypic ratio: Wild type: 778 Black vestigial: 785 Black normal: 158 Gray vestigial: 162 a) What does the observed phenotypic ratio suggest regarding the alleles for body color and wing shape? b) What could account for the existence of the observed recombinant phenotypes in the ratios shown above? c) Calculate the recombination frequency between the genes for body color and wing shape. What is the relative distance between these alleles on the same chromosome?

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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.