Gene Shuffling • What is it? • When does it occur? • Why is it important? Crossing-over Build A Bird Genetic Shuffle • Going to be performing the cross-over between chromosomes and shuffling genes • Making a pigeon zygote • Interpreting your pigeon’s genotype and drawing it’s phenotype • KEY TERMS • Gene vs Allele • Dominant vs Recessive • Genotype vs Phenotype Build A Bird Genetic Shuffle Helpful Hints & Rules • Working in partners • Answer Pre- lab questions BEFORE cutting. Come to me for a check mark to get your chromosomes. • DO NOT cut the chromosomes apart until Step 4, after each chromosome has a different combination of alleles • Fertilization: each partner will randomly select a male and female and have their own zygote • Everyone will turn in a pigeon with circled traits AND lab worksheet Things To Know • Recessive Red and Spread both mask wing pattern! If you get either or both of these, your pigeon will be all the same color • Gene= unit of DNA located on a chromosome that controls a trait • Allele= different forms of a gene • Genotype= genetic makeup ex. RR, Rr, rr • Phenotype = how the genotype is physically expressed.