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Transcript
Name:________________________________ Date:__________ Per:______ Punnett Square Practice Vocabulary - Match the definitions on the left with the terms on the right: ____ 1. genotypes made of the same alleles ____ 2. different forms of genes for a single trait ____ 3. gene that is always expressed ____ 4. gene that is expressed only in the homozygous state ____ 5. genotypes made of two different alleles A. alleles B. dominant C. heterozygous D. homozygous E. recessive Circle the choice(s) that apply to each vocabulary word: 6. Homozygous dominant AA Gg KK mm uu Rr TT 7. Homozygous recessive ee Ff HH Oo qq Uu ww 8. Heterozygous AA Ff Kk oo Qq Rr TT 9. Genotypes in which the dominant trait must show: AA Dd EE ff Jj RR Ss 10. Genotypes in which the recessive trait must show: aa Gg Ff KK rr Oo Tt Punnett Squares: 11. Examine the following Punnett squares and circle those that are correct. 12. In corn plants, normal height, N, is dominant to short height, n. Complete these four Punnett squares showing different crosses. Then, circle all of the homozygous dominant offspring. Put an X through all the heterozygous offspring. Leave all the homozygous recessive offspring unshaded. 13. In humans, being a tongue roller (R) is dominant over non-roller (r). A man who is a non-roller marries a woman who is heterozygous for tongue rolling. Father’s phenotype ________ Mother’s phenotype _________ Father’s genotype ________ Mother’s genotype _________ What is the probability of this couple having a child who is a tongue roller? ________ 14. In pea plants, round (R) is dominant to wrinkled (r). A heterozygous female is crossed with a wrinkled male. Make a Punnett Square to determine the possible offspring. a. What are the possible genotypes of the offspring?___________________ b. What are the possible phenotypes of the offspring? __________________ c. What is the probability of having an offspring that is round?_______ d. What is the probability of having an offspring that is homozygous?______ 15. SpongeBob SquarePants recently met SpongeSusie Roundpants at a dance. SpongeBob is heterozygous for his square shape (Rr), but SpongeSusie is round (rr). Create a Punnett square to show the possibilities that would result if SpongeBob and SpongeSusie had children. a. List the possible genotypes for their children: b. List the possible phenotypes for their children: c. What are the chances of a child with a square shape? ____ out of ____ or ____% d. What are the chances of a child with a round shape? ____ out of ____ or ____%