Materials: worksheet

• Turn in Spongebob worksheet to BLUE TRAY• Catalyst: 1. Identify the genotype and phenotype in the

following sentence: Martin has freckles on his cheeks. Freckles are a homozygous recessive trait (ff).

2. A homozygous dominant dad who has freckles is crossed with a heterzygous mother. What are the possible genotypes and phenotypes of their offspring?

Materials: ½ sheet of white paperTurn in Mitosis/Meiosis extra HW to blue tray!Get out worksheet from yesterday.Catalyst: In humans, widows peak is a recessive trait. What percentage of offspring will have widows peak if the mother has a homozygous recessive allele for the trait and the father is heterozygous for the trait?

Announcements

• Mutant Makers project overdue: 10% deduction

Detention List

• Sanchez Daniels• Jayme Lazaro• Tyrone Jenkins• Shane’ya Armstrong• Saphirre Brown• Willquarius Reese (2)• Sincere Monroe• Anquez Dawson• Shaniqua Salter• Amilja Adams• Demetrius Tillery

• Renee Tention• Austin Simpson• Lakeisha McDonald• Cesar Juarez• Jason Howard• Martino McClenton• Jose Martinez• Breneisha Laster• Ezekiel Calzada• Cameron Arnett• Jason Scandrick• Gilberto Rodriguez• Tye Campbell

Objective

• I can determine the genotypes and phenotypes of a figurative baby by flipping a coin to randomly assign traits.

• I can use these genotypes and phenotypes to accurately sketch a drawing of the created baby.

Background Information• How do babies get their traits?– One allele is given from each parent– Depends on if the baby is homozygous dominant,

homozygous recessive, or heterozygous.– Distribution of alleles is RANDOM!

Create a Baby Lab

• In today’s world, you cannot choose the alleles of your child.

• How will we make sure our alleles are given randomly today?– FLIP A COIN!

Determining Gender

• Females = XX• Males = XY

• What is the allele mom must give to the child?

• Gender is determined by the dad’s allele!

Is it a BOY or a GIRL?!?

• ONLY DAD WILL FLIP!

Heads = X Tails = Y

What does the coin flip tell us?

• Each “parent” will flip a coin.

Heads = Dominant Tails = Recessive(capital) (lowercase)

**Use the key provided for the correct letters.

When You Have All Your Alleles…

• Put mom and dad’s alleles together to create the baby’s GENOTYPE.

• Homozygous dominant = Dominant trait• Heterozygous = Dominant trait• Homozygous recessive = Recessive trait

The Baby is Born!

• Use the determined phenotypes to draw a picture of your baby boy/girl!