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Materials: worksheet

Materials: worksheet. Turn in Spongebob worksheet to BLUE TRAY Catalyst: Identify the genotype and phenotype in the following sentence: Martin has freckles on his cheeks. Freckles are a homozygous recessive trait ( ff ).

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Materials: worksheet

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  1. Materials: worksheet • Turn in Spongebob worksheet to BLUE TRAY • Catalyst: • Identify the genotype and phenotype in the following sentence: Martin has freckles on his cheeks. Freckles are a homozygous recessive trait (ff). • A homozygous dominant dad who has freckles is crossed with a heterzygous mother. What are the possible genotypes and phenotypes of their offspring?

  2. Materials: ½ sheet of white paper Turn 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?

  3. Announcements • Mutant Makers project overdue: 10% deduction

  4. Detention List Renee Tention Austin Simpson Lakeisha McDonald Cesar Juarez Jason Howard Martino McClenton Jose Martinez BreneishaLaster Ezekiel Calzada Cameron Arnett Jason Scandrick Gilberto Rodriguez Tye Campbell • Sanchez Daniels • Jayme Lazaro • Tyrone Jenkins • Shane’ya Armstrong • Saphirre Brown • Willquarius Reese (2) • Sincere Monroe • Anquez Dawson • Shaniqua Salter • Amilja Adams • Demetrius Tillery

  5. 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.

  6. 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!

  7. 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!

  8. Determining Gender • Females = XX • Males = XY • What is the allele mom must give to the child? • Gender is determined by the dad’s allele!

  9. Is it a BOY or a GIRL?!? • ONLY DAD WILL FLIP! Heads = X Tails = Y

  10. 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.

  11. 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

  12. The Baby is Born! • Use the determined phenotypes to draw a picture of your baby boy/girl!

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