Download ch 11 Test QUestions STUDY

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Ch 11 TEST Study Guide Questions
Answer these questions on a separate piece of paper for credit.
1. What is the phenotype ratio or percentage of the offspring in the Punnett square in Figure 11.2?
2. How many recessive alleles must an organism inherit in order to show that trait?
3. A cross between two organisms that are heterozygous for two different genes (AaBb) will result in a ratio of
9:3:3:1. Will you be able to tell the genotypes of all the organisms if you only see the phenotypes?
4. What does figure 11.5 show?
5. In figure 11.5, what is the genotype of the pink flowers?
6. In figure 11.5, if red flowered snap dragons and white flower snap dragons are crossed, what percentage of would
be pink?
7. In figure 11.5, if two pink flowers are crossed, what % of offspring will be pink?
8. In 11.4, What would be the phenotype of X in the Punnett Square? Black hair is dominant to white and Smooth
hair is dominant rough .
9. In 11-4, What are the genotypes of the offspring that have black, rough hair?
10. In 11.4, What fraction of offspring would be expected to have smooth white hair?
11. In 11.4, Identify the genotypes of the offspring that are represented in X box.
12. When roan cows RW and bulls RW are bred, according to the principle of co-dominance, what % of offspring will
be roan? Roan means that the cow is both reddish and white fur.
13. Y/N, Does coat color in rabbits have a single allele?
14. To whom do Mendel’s principals apply?
15. In the P generation, a homozygous tall plant is crossed with a homozygous short plant. The F 1 generation self
pollinated. How many in the F2 generation will be tall?
16. If one parent is homozygous tall and the other homozygous short, what will the F1 generation inherit from these
parents?
17. What did Mendel use pea plants to study?
18. What is it called when one allele is not completely dominant or recessive?
19. Y/N Are linked genes on the same chromosome?
20. What are offspring called that have different traits from their pure breed parents?
21. When Mendel crossed pure breed tall with pure bred short, why were all the offspring tall?
22. Can a Punnett square show the actual genetic cross?
23. What would happen to the offspring if a hybrid tall plant were crossed with a pure breed short plant and the
alleles did not segregate during gamete formation?
24. Do Chromosomes assort independently? Do genes? Do traits?
25. What principle states that during gamete formation, genes for different traits separate without influence on each
other, such as tall and yellow?
26. Tall and Purple are dominant. What is the genotype of a heterozygous tall-heterozygous purple plant?
27. What is the chemical factors called that determine traits?
28. Tall and Purple are dominant. What is the genotype of a heterozygous tall-homozygous green plant?
29. Variation of human skin is an example of what?
30. Tall and Purple are dominant. What are the phenotypes of this cross TtPP x TTPp
31. For what is the principle of probability used?
32. Write the principle of dominance.
33. 11-2, What does this Punnett prove about independent assortment?
34. If a roan cow has a genotype of RW, what are the genotypes of the parents? What does this show?
35. If both alleles are the same, such as AA or aa, what term is used?
36. What is the probability that your first child will be a boy?
37. Why do recessive traits, such as short plant, show up in the F 2 generation, but not the F1?
38. When you have a plant that has RrYY, how many different combinations of each trait can you have during
independent assortment?
39. 11-1. What is the phenotype of the offspring?
40. When you have two plants that are crossed that have RrYy x RRYy , how many different phenotypes will show
up?
41. Tall and purple are dominant. Parent 1 is heterozygous tall-homozygous green x Parent 2 is heterozygous tallheterozygous purple. What is the phenotypes of each offspring ratio?
42. Purple corn is dominant to yellow corn. You have some purple corn, how could you prove you have hybrid or
purebred purple corn?
43. If two genes are located on the same chromosome and rarely assort independently, what would that indicate
about location on the chromosome?
44. T/F Traits are inherited through parents to offspring.
45. If a black rooster is crossed with a white hen, the offspring are checkered feathers, (black and white). What does
this demonstrate?
46. Purple corn is dominant. If the offspring have 76 kernels that are purple and 74 that are yellow, what are the
genotypes of the parents?
47. If the F1 generation his hybrid tall, what can be said about the F2 generation if both parents are hybrids?
48. T/F If the parents are Pure bred dominant and pure breed recessive, the F1 generation have the same genotype
as one of the parents?
49. What is the only way you can get a green pea, which is recessive?
50. How likely is it that two genes located on the same chromosome, but not close will get separated during crossover
of meiosis?
51. RR = red, RW= pink, WW= white. If you cross a pink flower (RW) and a white flower (WW), what will be the
phenotypes of the offspring?
52. What is the phenotypic ratio of RRYY x RrYy?
53. What is the GENOTYPE of offspring when crossing Tt x Tt?
54. 11-1, what are the genotypes of the offspring?
11-2
11-1
T
11-5
11-4
X