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Mrs. B’s Family Tree

Mrs. B’s Family Tree. Dominant Recessive And Punnett Square intro. Recap. What is a phenotype? What is a genotype? Which allele is expressed? (What gene type overpowers the other?) What happens when both a dominant and recessive allele are present?

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Mrs. B’s Family Tree

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  1. Mrs. B’s Family Tree Dominant Recessive And Punnett Square intro

  2. Recap • What is a phenotype? • What is a genotype? • Which allele is expressed? (What gene type overpowers the other?) • What happens when both a dominant and recessive allele are present? • What three combinations can yield 100 percent of the same phenotype?

  3. Immediate family Both My brother Jason and I are recessive What are our phenotypes? a) hair b) eyes Jason Mike is Dominant Mike Mrs. B 4. What is his phenotype? 5. What could his phenotypes be? 2. My eye and hair genotypes are ____ _____ 3. Jason’s eye and hair genotypes ____ _____ Dad Mom

  4. Since my parents are Dominant and they had both Dominant and recessive offspring, what must their genotype be? a) hair b) eyes

  5. Punnett Square What proportion of the offspring are recessive? What proportion of the offspring are dominant? Which generation in Mendel's pea plant experiments yielded the same proportions?

  6. Grand-pop and Grand-mom Grand-mom has brown eyes and had brown hair. Both of her sons have brown hair and brown eyes. 2. What is Grand-mom’s genotype? a) hair b) eyes Grand-pop was blonde and had blue eyes. 1. What is the genotype for his a) hair b) eyes

  7. Punnett Square What proportion of the offspring are recessive? What proportion of the offspring are dominant? Which generation in Mendel's pea plant experiments yielded the same proportions?

  8. Mom-mom and Pop-pop Mom-mom had Brown eyes and brown hair. What could her genotypes be? a) hair b) eyes If I tell you that my mom and two of her brothers have brown eyes and brown hair, and her other one brother and sister have blue eyes and blonde hair, 2. What are Mom-mom’s genotypes? a) hair b) eyes Pop-pop has blonde hair and blue eyes 3. What are his genotypes? a) hair b) eyes

  9. Punnett Square What proportion of the offspring are recessive? What proportion of the offspring are dominant? Which generation in Mendel's pea plant experiments yielded the same proportions?

  10. Jason and Carolyn Jason is recessive 1.What are his phenotypes a) hair b) eyes and genotypes c) hair d) eyes Carolyn is heterogeneous Dominant 2. What are her phenotypes a) hair b) eyes genotypes a) hair b) eyes 3. What can we use to determine possible offspring?

  11. Punnett Square What proportion of the offspring are dominant? What proportion are recessive? What do you think the phenotypes of their son Benjamin are?

  12. Benjamin

  13. Mike and Steph What are their phenotypes? a) hair b) eyes 2. What could their genotypes be? a) hair b) eyes

  14. Eli What are Eli’s phenotypes a) hair b) eyes 3. What are his genotypes hair eyes 2. Is Eli dominant or recessive?

  15. What do Mike and Steph’s genotypes have to be

  16. Punnett Square What proportion of the offspring are recessive? What proportion of the offspring are dominant? Which generation in Mendel's pea plant experiments yielded the same proportions?

  17. When I have kids what color eyes must they have? We both have ___________ alleles.

  18. Punnett Square What are the proportions my future offspring? Phenotype? Genotype?

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