1. A TT (tall) pea plant is crossed with a tt (short) plant. What percentage of the offspring will be tall? _____________% 2. A Tt pea plant is crossed with a Tt pea plant. What percentage of the offspring will be short? _____________% 3. A heterozygous round seeded plant (Rr) is crossed with a homozygous round seeded plant (RR). What percentage of the offspring will be homozygous (RR)? _____________%

1. A TT (tall) pea plant is crossed with a tt (short) plant. What percentage of the offspring will be tall? _______% 2. A Tt pea plant is crossed with a Tt pea plant. What percentage of the offspring will be short? _% 3. A heterozygous round seeded plant (Rr) is crossed with a homozygous round seeded plant (RR). What percentage of the offspring will be homozygous (RR)? _______%

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter8: Patterns Of Inheritance

Section: Chapter Questions

Problem 1ACQ: Figure 8.9 In pea plants, round peas (R) are dominant to wrinkled peas (r). You do a test cross...

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The dominant C allele of a gene that controls color in corn produces kernels with color; plants homozygous for a recessive c allele of this gene have colorless or white kernels. What kinds of gametes, and in what proportions, would be produced by the plants in the following crosses? What seed color, and in what proportions, would be expected in the offspring of the crosses? a. CCCc b. Cccc c. CcCc
Figure 8.9 In pea plants, round peas (R) are dominant to wrinkled peas (r). You do a test cross between a pea plant with wrinkled peas (genotype rr) and a plant of unknown genotype that has round peas. You end up with three plants, all which have round peas. From this data, can you tell if the parent plant is homozygous dominant or heterozygous?
1. Use the following information to answer the question: Parental cross is RrYy x RrYy Seed Shapes are R-round, r-wrinkled Seed colors are Y-yellow, y-green Based on the information given, what is the phenotype ratio of the offspring of this cross? 2. A pea plant heterozygous for height and seed color (TtYy) is crossed with a pea plant heterozygous for height but homozygous recessive for seed color (Ttyy). If 80 offspring are produced, how many are expected to be tall and have yellow seeds? 3. What is the chromosome theory of inheritance? How does this theory explain Mendel's results? 4. A cross between two organisms heterozygous for two different genes (AaBb) results in a 9:3:3:1 phenotype ratio among the offspring. Is the offspring's genotype ratio the same? Explain your answer.…
1. In pea plants, yellow color (Y) is dominant over green color (y). A yellow-colored pea plant is crossed with a green-colored pea plant. Half of their offspring is yellow-colored while the other half is green-colored.What is the genotype of the yellow-colored parent? YY O Yy yy The genotype cannot be determined. 2. A scientist discovered an unknown organism in a tropical rainforest. The organism has been identified to possess the following characteristics: (1) multicellular at some point of its life cycle; (2) feeds on decaying organic matter; and (3) has a cell wall made of chitin.Which Kingdom does the unknown organism likely belong to? Kingdom Animalia Kingdom Plantae Kingdom Fungi Kingdom Protista 3. Which statement about ferns is TRUE? Ferns are unicellular organisms. Ferns are nonvascular plants. O Ferns have spores as reproductive structures. Ferns are capable of secondary growth.
1. You are given a female F1 of unknown genotype. You cross the female fly to a homozygous male that has forked bristles and malformed eyes. The offspring of the cross is shown below: (Define symbols for your traits) Phenotype Forked bristles, normal eyes 752 Number Genotype Forked bristles, malformed 56 eyes Malformed eyes, normal bristles Normal eyes, normal bristles 820 64 a. What are the genotypes of the offspring? b. Based on the progeny, what were the genotypes of the F1 parents? What is the distance between for and mal?
1. Complete the Punnett square for a cross between a homozygous red-flowered snapdragon (RR) and a homozygous white-flowered snapdragon (WW). Give the ratio for the phenotype and the genotype. Key F1 Genotypic Ratio: RR – red Phenotypic Ratio: wW- white RW- pink 2. Complete the Punnett Square for a cross between two Fi plants (WW). Give the phenotypic ratio for the F2 generation. F2 Phenotypic ratio: 3. Cite some possible applications of genetics to plant breeding.
1. What are the expected genotypes and their ratios for the gametes the parents in the crosses below can produce? 2. What are the expected genotypic and phenotypic ratios of the F1 progeny? 1. Aa x aa 2. Aa x AA 3. Aa x Aa 4. BbCc x bbcc 5. BbCc x Bbcc 6. BbCcx BbCC
A white-flowered plant is crossed with a pink-flowered plant. All of the F1 offspring from the cross are white. 4. Which phenotype is dominant? 5. What are the genotypes of the original parent plants? 6. What is the genotype of all the F1 offspring? 7. What would be the percentages of genotypes & phenotypes if one of the white F1 plants is crossed with a pink-flowered plant? 8. Which of Mendel's Laws is/are illustrated in this question? 9. Which cross would produce phenotypic ratios that would illustrate the Law of Dominance? C. Tt x Tt A. TT x tt B. TT x Tt D. tt x tt 10. Mendel formulated his Law of Segregation after he had: C. produced mutations D. produced hybrids A. studied F1 offspring B. studied F2 offspring
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In a particular plant, long stem is dominant over short stem. This same plant may produce red flowers or white flowers with this trait showing nondominance. Cross a heterozygous long stemmed pink plant with a heterozygous long stemmed red flowering plant. 10. Genotype of the heterozygous long-stemmed pink Genotype of the heterozygous long-stemmed red Genotypes Phenotypes Created hv Amy Brown Science
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