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Larkey Genetics

Larkey Genetics. What happens in a Larkey population?. From Genotype to Phenotype!. Decode the genotype to produce the Larkey’s phenotype!. Larkey Parents. Female Parent Male Parent Genotype Genotype A A a a E E e e f f F F t t T T

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Larkey Genetics

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  1. Larkey Genetics What happens in a Larkey population?

  2. From Genotype to Phenotype! • Decode the genotype to produce the Larkey’s phenotype!

  3. Larkey Parents Female Parent Male Parent Genotype Genotype A A a a E E e e f f F F t t T T Record their genotypes and draw the phenotypes on the “Larkey Breeding Record.”

  4. Larkey Genetics • The parent Larkeys will produce a male and female Larkey. • Record their genotypes and draw the phenotypes on the “Larkey Breeding Record.”

  5. F1 Generation Results • Genotypes= Aa, Ee, Ff, and Tt • Phenotypes = short legs, red eyes, solid fur, bushy tails • All offspring will have the same genotypes, and therefore, the same phenotypes. Why?

  6. Types of Alleles • homozygous alleles = both parents started with genotypes that had identical alleles, so there is little diversity; homozygous may be two dominant or two recessive alleles; AA, aa, EE, ee, etc. • heterozygous alleles = genes with one dominant allele and one recessive allele; Aa, Ee, etc.

  7. Punnett Squares • This is a simple graphical way of discovering all of the potential combinations of genotypes that can occur in children, given the genotypes of their parents. • It also shows us the odds of each of the offspring genotypesoccurring.

  8. Immigrant Male • Now, an immigrant male produces a son and a daughter with the female. • This will increase diversity!

  9. F2 Generation Genotypes Female Immigrant Male Genotype Genotype A a A a E e E E F f F f T t T t

  10. F2 Generation Results-Male • Genotypes = Aa, EE, Ff, and Tt • Phenotypes = short legs, red eyes, solid fur, bushy tail • As more Larkeys are introduced, the genetic diversity will increase! This creates a healthy population. • Record their genotypes and draw the phenotypes on the “Larkey Breeding Record.”

  11. F2 Generation Results-Female • Genotypes = AA, EE, ff, and tt • Phenotypes = short legs, red eyes, spotted fur, bare tail • As more Larkeys are introduced, the genetic diversity will increase! This creates a healthy population. • Record their genotypes and draw the phenotypes on the “Larkey Breeding Record.”

  12. Reading Assignment! • With another person at your table group, you will FINISH THIS ASSIGNMENT: • Partner read pages 46 through 55. • Under each green heading, you will write down 2-3 things you learned in your Science Notebook! • Finished Early? Come see me! 

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