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- 1. Open EndedWhen a F1 plant (heterozygote--Gg) undergoes meiosis, what gamete types will it produce, and in what proportions?
- 2. Open EndedWhat are Punnett squares used for?
- 3. Open EndedMendel's Law of Segregation
- 4. Open EndedTrue-Breed
- 5. Open EndedWhich of the following would be true of a plant heterozygous for a single gene controlling flower color? (assume complete dominance).
- 6. Open EndedThe 3:1 phenotypic ratio observed among progeny of an F1 X F1 cross requires random union of gametes.
- 7. Open EndedThe 1:2:1 genotypic ratio
- 8. Open EndedOf the methods listed below, which would be the best way to determine which of the two alleles of a gene is dominant to the other?
- 9. Open EndedA couple has two boys and is expecting a third child. The probability that the third child will be a boy is 1/2.
- 10. Open EndedWhat is the probability of a family with six children having three boys and three girls?
- 11. Open EndedIf three differently colored dice are rolled at the same time, what is the probability that a 6 will be the outcome on each one?
- 12. Open EndedWhich of the following phenomena is a consequence of Independent Assortment?
- 13. Open EndedThe 9:3:3:1 ratio exhibited in the F2 generation of a dihybrid cross is a genotypic ratio.
- 14. Open EndedA pea plant is heterozygous for two genes; one controlling height, one controlling color. The genotype is written PpTt. Based on the Law of Independent Assortment, approximately what proportion of the pollen produced by this plant should have the genotype PT?
- 15. Open EndedIn an individual that is heterozygous for a particular trait, the recessive allele is not expressed.
- 16. Open EndedRound (R) seed shape is dominant to wrinkled (r) seed shape in pea plants. If an RR plant is crossed with an rr plant, what is the frequency of phenotypes in the F2 generation?
- 17. Open EndedIf the first three F2 offspring grown from the cross described above are round, what is the probability that the next F2 offspring will be wrinkled?
- 18. Open EndedMendel studied pea plants dihybrid for seed shape (round versus wrinkled) and seed color (yellow versus green). Recall that -the round allele (R) is dominant to the wrinkled allele (r) and -the yellow allele (Y) is dominant to the green allele (y). The table below shows the F1 progeny that result from selfing four different parent pea plants. Use the phenotypes of the F1 progeny to deduce the genotype and phenotype of each parent plant. Complete the table by dragging the correct label to the appropriate location. Labels can be used once, more than once, or not at all.
- 19. Open EndedA plant grown from a [round, yellow] seed is crossed with a plant grown from a [wrinkled, yellow] seed. This cross produces four progeny types in the F1: [round, yellow], [wrinkled, yellow], [round, green], and [wrinkled, green]. Use this information to deduce the genotypes of the parent plants.
- 20. Open EndedFor the cross in Part B, predict the frequencies of each of the phenotypes in the F1 progeny, and determine the genotype(s) present in each phenotypic class.
- 21. Open EndedIn a cross between two strains that are true breeding for purple and white flowers, the F2 phenotypic ratio would be ¼ purple, ¼ white, and ½ lavender if the flower color phenotype exhibits incomplete dominance.
- 22. Open EndedWhich of the following statements about an individual with the Bombay phenotype is correct?
- 23. Open EndedWhat is the expected phenotypic ratio of a cross between a disc-shaped squash that is heterozygous at both loci and a long squash?
- 24. Open EndedIncomplete dominance is shown in the flower color of snapdragons, as shown in this figure. Choose the offspring phenotypes you would expect from the following cross: R 1 R 1 × R 1 R 2 R1R1 red R1R2 pink R2R2 white
- 25. Open EndedChoose the offspring phenotypes you would expect from the following cross: R 1 R 1 × R 2 R 2 R1R1 red R1R2 pink R2R2 white
- 26. Open EndedChoose the offspring phenotypes you would expect from the following cross: R 1 R 2 × R 1 R 2 R1R1 red R1R2 pink R2R2 white
- 27. Open EndedChoose the offspring phenotypes you would expect from the following cross: R 1 R 2 × R 2 R 2 R1R1 red R1R2 pink R2R2 white
- 28. Open EndedYou would like to know whether the progeny of a pair of mated fruit flies are distributed among the resulting four phenotypic classes in a 1:1:1:1 ratio. You perform a chi-square test and obtain a p value of 0.04. Assuming you have done the test correctly, select the best interpretation of this result.
- 29. Open EndedThe larger the number of total individual counts in a chi-square test, the higher the degrees of freedom (df).
- 30. Open EndedThe expected ratio of phenotypes among the progeny of a test cross is 1:1:1:1. Out of 200 total resulting progeny, 48 occur in one of the four phenotypic classes. Given this information, which of the following must also be true?
- 31. Open EndedPedigree Analysis
- 32. Open EndedWhich term describes the individual in a pedigree whose phenotype was first brought to the attention of a medical researcher?
- 33. Open EndedWhich of the following statements about autosomal recessive traits is true?
- 34. Open EndedWhat is the most likely mode of transmission for a trait that is not expressed in parents but is expressed by one half of the sons?
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