OBJ: Given notes, video activity sheet SWBAT solve punnett square problems with 70% accuracy. BRING IN TEXT BOOK DN: HW check- Mendel’s Work Booklet Video: Punnett Squares ACT: Introduction to: Genotype vs. Phenotype How to Solve Punnett Square Problems Complete “Making Punnett Squares” Activity Sheet HW: Text, read p. 84-89; Complete Probability and Heredity Booklet; UPCO9 Quiz (Ch.5, Body Systems, Photosynthesis) week of April 1; Genetics Exam, April 23

What is the purpose of Punnett Squares? Punnett Squares: is a technique used to predict what percentage of offspring (children) will be likely to have a particular trait (physical feature). Ex: What is the chance my child will have Down’s Syndrome? What is the chance my child will have blue eyes? What is the chance that I am carrying the breast cancer gene?

Genetics Vocabulary Gene = allele (dad) + allele (mom) Allele (part of gene) = T or t Purebred (homozygous)= same alleles (gene); TT, t t Hybrid (heterozygous)= mixture of alleles (gene); Tt Dominant = shows itself (strong); Tt, TT Recessive = often hidden (weak) except when all alleles (genes) are recessive; t t Offspring = children Genotype = the genetic makeup of an organism Ex: TT, Tt, tt Phenotype = the physical observable appearance of an organism. Ex: tall, short