Dominant Allele Recessive Allele

R = red eyes r = white eyes

A = curly wings a = straight wings

B= long , thin bristles b=short, forked bristles

Y = tan body y = 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

Offspring Genotype Phenotype

Example Rr, aa, BB, Yy Red eyes, straight wings, long bristles, tan body

1

2

3

4

Asexual Reproduction Data:

Offspring Genotype Phenotype

1

2

Nucleus

Chromosomes