Punnett Squares. Monohybrid Crosses A punnett square that examines only one trait at a time. Shows the probability of the traits of offspring. Set up.

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Punnett Squares

Monohybrid Crosses A punnett square that examines only one trait at a time. Shows the probability of the traits of offspring. Set up of a monohybrid cross Parent 1 Genotype Parent 2 Genotype

Example Monohybrid Cross Mendel breed a heterozygous tall pea plant and a heterozygous tall pea plant. Probabilities:

Dihybrid Cross A punnett square that examines two traits at one time Shows the probability of two traits of the offspring Set-up of dihyrid cross Parent 1 Genotype Parent 2 Genotype

Example of Dihybrid Cross Mendel cross one garden pea plant heterozygous for height and seed shape with a garden pea plant heterozygous for height and seed shape

HOMEWORK COPY AND COMPLETE PUNNETT SQUARE 1.TT x tt6. YY x yy 2.Tt x Tt7. WW x Ww 3.Pp x pp8. Ff x Ff 4.PP x pp9. Zz x zz 5.Rr x Rr10. aa x Bb Determine if the following are homozygous (ho) or heterozygous (he) 1. AA6. aa 2. Pp7. ZZ 3. Tt8. TT 4. ff9. Rr 5. rr10. pp