Talk the Talk: Heredity Trait Gene DNA Chromosome Allele Genotype Phenotype Heterozygous Homozygous
Dominant and Recessive Traits For each of our traits, we inherit one allele from Mom and one from Dad. One allele usually expresses itself (we can see it) and the other remains hidden. The expressed allele is dominant and the allele we can’t see is recessive. Example: If curly tail is dominant to straight tail, a puppy who received a curly tail allele from its mother and a straight tail allele from its father will have a curly tail.
Human Traits No Widows Peak (W). Widow’s peak ( w ). My phenotype = Dimples (D). No Dimples (d). My phenotype = Freckles (F). No Freckles (f). My phenotype = Hand Cross Right Thumb Top (R). Left Thumb Top ( r ). My phenotype = Tongue Rolling (T). No Tongue Rolling (t). My phenotype = Free earlobe (E). Attached Earlobe (e). My phenotype =
Make a graph of the class data for those expressing the recessive phenotype. Make a graph of the class data for those expressing the dominant phenotype.
Conduct a Survey Work with a partner Survey at least 20 people for traits that were studied in class People must agree to take part in your survey
TraitTally Widow’s Peak No Widow’s Peak Dimples No Dimples Freckles No Freckles Right Thumb Cross Left Thumb Cross Tongue Roller Non Tongue Roller Free Earlobe Attached Earlobe Total Number of People Surveyed
Explain it: Use key vocabulary to write a paragraph that explains how traits are inherited and why this results in a wide range of phenotypes.