Dominant AlleleRecessive AlleleR = red eyesr = white eyes A = curly wingsa = straight wings B= long, thin bristlesb=short, forked bristles Y = tan bodyy = yellow body Sexual Reproduction Data: Title: Fornicating Fruit Flies Introduction: Today, you and a partner will generate and observe fruit fly offspring (babies) by mating a male and female fruit fly (species name: Drosophila melanogaster). Fruit flies are commonly used in genetics, the study of genes and patterns of inheritance. Inheritance is the passing of genes and traits from parent to offspring. Organisms reproduce or produce new offspring using one of two methods: sexual or asexual reproduction. Most animals, like humans and fruit flies, generate offspring by sexual reproduction. The offspring from sexual reproduction inherit genetic information from two different organisms. In contrast, the offspring of asexual reproduction only inherit genetic information from one parent. Some organisms are able to do both! Pre-Lab Questions: 1)Offspring is a different word for _______ a.Parents b. Babies c. Genes d. reproduction 2)_______ is the passing down of genes from parent to offspring. a.Genetics b. Reproduction c. Inheritance d. Offspring 3)How is inheritance different in asexual and sexual reproduction? Offspring from asexual reproduction inherit _______________ ____________________________ ________________________, while Offspring from sexual reproduction inherit ________________ ____________________________ __________________________ ____. Drosophila Traits OffspringGenotypePhenotype ExampleRr, aa, BB, YyRed eyes, straight wings, long bristles, tan body Asexual Reproduction Data: OffspringGenotypePhenotype 1 2

Nucleus Chromosomes