Genotype & Phenotype

PhenotypeGenotype HeterozygousHomozygous

Phenotype What an organism looks like (photo) Ex: brown hair, green eyes Genotype HeterozygousHomozygous

Phenotype What an organism looks like (photo) Ex: brown hair, green eyes Genotype Combination of alleles (genes) Ex: Bb, rr HeterozygousHomozygous

Phenotype What an organism looks like (photo) Genotype Combination of alleles (genes) Heterozygous Different Ex. Bb Homozygous

Phenotype What an organism looks like (photo) Genotype Combination of alleles (genes) Heterozygous Different Ex. Bb Homozygous Same Ex. BB

For each genotype below, indicate whether it is heterozygous (He) or homozygous (Hm) Ex 1:AA _____ Ex 2: Gg____ 1. Ee ____2. kk____ 3. Ii _____ 4. oo____ 5. Mm _____6. HH____ 7. Bb _____ 8. LL____ 9. ff ____ 10. Pp____ 11. Jj _____ 12. DD ____ 13. nn _____14. Cc _____

For each of the following genotypes determine what phenotypes would be possible…

Practice #1: Purple flowers (P) are dominant to white flowers (p). (P=dominant, p=recessive) –PP___________________ –Pp___________________ –pp___________________

Practice #2: Bobtails in cats are recessive. (T=tails, t=bobtails) –TT _________________ –Tt _________________ –tt________________

Practice #3: Round seeds are dominant to wrinkled seeds –RR__________________ –Rr__________________ –rr __________________

Practice #4: Brown eyes are dominant to blue eyes –BB_________________ –Bb________________ –bb________________

For each of the following phenotypes, list the genotypes (remember to use the letter of the dominant trait)

Practice #1: Straight hair is dominant to curly. ___ straight ____ curly

Practice #2: Pointed heads are dominant to round heads. _____ pointed _____ round

Practice #3 Brown hair is dominant to blonde hair ________ Brown hair _________Blonde hair