1. 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 ; Complete Probability and Heredity Booklet; UPCO9 Quiz (Ch.5, Body Systems, Photosynthesis) week of April 1; Genetics Exam, April 23

2. 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?

3. 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