You will compare the morphological traits of wild and mutant flies. Complete Table 1, recording the difference you see between mutant and wild-type flies with appropriate symbols, sketches, or descriptions. First, examine wild-type flies that are considered normal for all traits listed below. Place a plus sign in the appropriate space to signify the normal condition. Carefully examine flies from four mutant stocks prepared as unknowns in the laboratory and compare them with the wild type. If the unknown flies are wild-type for a given trait, place a plus sign in the appropriate space. If they are different from wild-type, diagram the mutant trait or use one or two key words to describe it briefly. Observe and sketch each of the following: Phenotype Wildtype vestigial apterous dumpy black Location Chromosome Genotype +/+ vg/vg aplap dp/dp b/b wing wing wing body body body 2. yellow ebony brown 1 (sex-linked) 3 y/y ebleb bw/bw w/w selse eyley vn/vn eye I (sex-linked) 3 white eye sepia eyeless vermillion eye eye 4 eye 1 (sex-linked) Comparison of wild-type and mutant Drosophila. Wild-type Trait Yellow Body Vestigial wing White eyes Eyeless Body color Eye color Eye shape Wing shape and size Antenna shape and size | Bristle shape and size If the mutant flies are wild type for a given trait, place a +' sign in the appropriate space. If they are different from wild type, use one or two keywords to describe it briefly.

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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.