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Punnett Squares

Punnett Squares. Punnett Squares :. A Model used to show the possible ways genes can combine during fertilization. Punnett Squares. Punnett Squares. Helps you keep track of traits. What is a trait?. Trait: a genetically determined characteristic or condition

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Punnett Squares

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  1. Punnett Squares

  2. Punnett Squares : A Model used to show the possible ways genes can combine during fertilization.

  3. Punnett Squares Punnett Squares Helps you keep track of traits.

  4. What is a trait? Trait: a genetically determined characteristic or condition Examples: dominant and recessive traits

  5. . Punnett Squares Dominant and recessive alleles are represented by letters.

  6. Punnett Squares A capital letter (T) is used for dominant alleles. T

  7. Punnett Squares A lowercase letter (t) is used for recessive alleles. t

  8. Monohybrid Cross Monohybrid cross is a genetic cross made to examine the distribution of ONE specific set of alleles in the resulting offspring. ~We will be using a 2X2 box

  9. Punnett Squares If you wanted to know the type of offspring a cross between two parents would produce, you can use a punnett square. Tt x Tt TT,Tt for tall Tt for short

  10. Punnett Squares The letters representing the alleles from one parent are placed along the top of the square. Tt

  11. Punnett Squares The letters representing the two alleles from the second Parent are placed along the side of the square. T t

  12. Punnett Squares Tt x Tt Tt T t

  13. Punnett Squares Squares are filled by writing the letter at the top beside the letter on the side. Tt T t

  14. Punnett Squares The letters in each of the squares represents the Genotypes of the offspring that the parents could produce. TT Tt Tt t t Tt T t

  15. Punnett Squares Genotype is the genetic makeup of an organism Phenotype is the physical appearance of an organism due to the genotpe

  16. Punnett Sqaures Genotype Phenotype TT tall Tt tall Tt tall t t short

  17. Punnett Squares Probability: the ratio that a particular event could occur. 3:1 3 would be tall 1 would be short out of 4 offspring

  18. Punnett Squares: • Help you keep track of traits. • Predict genotype and phenotype. • Calculate probability.

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