One Fish, Two Fish, Red Fish, Blue Fish! Introduction to Genetics
Envelopes • Your envelope has 4 fish • Red fish- female traits • Blue fish- male traits • Work with a partner to determine what the offspring will look like. • Time limit- 3 minutes
Punnett Squares • Monohybrid Cross- 1 trait being crossed
Punnett Squares R R B B
Punnett Squares R R B BR BR B BR BR
Genetic Terms • Genetics- thescienceofheredity, study of genes • Allele- anyofseveralformsofagene (a single letter) • Dominant- the allele that ‘masks’ the recessive allele • Recessive- the allele that is ‘masked’
Genetic Terms • Trait- aninheritedcharacteristic • Monohybrid Cross- agenetic cross made to examine the distributionofonespecific set of alleles in the resulting offspring. • Genotype- the genetic makeup of an organism or group of organisms with reference to a single trait, set of traits, or an entire complexoftraits. • Phenotype- theappearance of an organism resulting from the interactionofthegenotypeandthe environment.