Phenotype Genotype Worksheet

19.02.2025, 16:16 Genotype and Phenotype Worksheet Genetics worksheet part 1 Understanding Phenotype and Genotype, you must understand homozygous and heterozygous as well as dominant and recessive. If you don’t understand these terms please ask. Use the following traits to determine Phenotype and Genotype. Trait Ear Lobes Hair Type Dimples Thumb Eyelashes Dominant Free Ear Lobes Curly Dimples Straight Thumb Long Eyelashes Allele E C D T L Recessive Attached Ear Lobes Straight No Dimples Curved Thumb Short Eyelashes Allele e c d t l 1. Write out the GENOTYPE(S) for these people: a. Heterozygous long eyelashes ______ b. Homozygous straight thumb ______ c. Dimples ______ d. Straight hair ______ e. Hybrid free ear lobes ______ f. Homozygous curved thumb ______ g. Hybrid curly hair h. Straight thumb ______ ______ 2. Write out the PHENOTYPES for these people a. Ee ______________________________________ b. cc ______________________________________ c. DD _____________________________________ d. Dd _____________________________________ e. Tt ______________________________________ f. ll ______________________________________ g. Ll ______________________________________ h. CC _____________________________________ i. LL _____________________________________ j. Cc _____________________________________ about:blank 1/3 19.02.2025, 16:16 Genotype and Phenotype Worksheet Phenotype/Genotype Worksheet Fill in the symbol that describes each type of allele. The letter used is traditionally the first letter of the dominant trait. Both the dominant and recessive alleles for each trait are the same letter. The dominant is capital, the recessive is lower case. Trait Seed shape Seed color Pod shape pod color Flower Position Plant Height Dominant Round Yellow Smooth Green Axial Tall Symbol Recessive wrinkled green constricted yellow Terminal Short Symbol Genotype – the pair of alleles that make up a gene. Types (Homo = same, hetero= different) Homozygous dominant = both alleles are dominant (both capital letters) Homozygous recessive = both alleles are recessive (both lower case) Heterozygous = one of each (one capital, one recessive) Use the above chart to answer the following answers. Give the genotype for each gene. 1. Homozygous dominant seed shape about:blank 2. Homozygous dominant plant height 3. Homozygous recessive seed color 4. Homozygous recessive pod color 5. Heterozygous seed shape 6. Heterozygous pod color 7. Homozygous dominant pod shape 8. Heterozygous pod shape 9. Homozygous recessive pod color 10. Heterozygous plant height 2/3 19.02.2025, 16:16 Genotype and Phenotype Worksheet Phenotype – the resulting characteristic of the organism When alleles are either dominant or recessive – only the dominant trait is expressed (shows up). If the genotype is RR the phenotype is round (both alleles are dominant) If the genotype is Rr, the phenotype is round (one is dominant, one is recessive so the dominant shows up) If the genotype is rr, the phenotype is wrinkled. (both are recessive so the recessive shows up) Give the PHENOTYPES for the previous genotypes. about:blank 1. Homozygous dominant seed shape 2. Homozygous dominant plant height 3. Homozygous recessive seed color 4. Homozygous recessive pod color 5. Heterozygous seed shape 6. Heterozygous pod color 7. Homozygous dominant pod shape 8. Heterozygous pod shape 9. Homozygous recessive pod color 10. Heterozygous plant height 3/3