A female Drosophila fly is heterozygous for three recessive pigmentation mutations called pl, bk, and op. pl is associated with purple eyes, bk is associated with a black body, and op is associated with opaque wings. A geneticist crosses this fly to a male purple, black, and opaque fly and obtains the 1000 progeny given in the table. Phenotype black wild type purple, opaque purple, black Number 50 200 52 205 Based on the table, which genes are linked? bk and op pl and bk O pl and op Calculate the distance between the linked genes. distance between the linked genes: Phenotype opaque black,opaque purple, black, opaque purple Number 199 43 206 45 m.u.

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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.