Solve these problems by listing the given genotypes, test crosses, genotypic and phenotypic ratios. 1. A plant with serrated leaf margins (A^aA^a) is crossed with a plant with smooth leaf margins (A^bA^b). What will be the phenotypic and genotypic ratios if a homozygous plant with serrated leaves is crossed with a plant with wavy leaves? Given: Test Cross: Genotypic Ratio: Phenotypic Ratio:
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- Solve the following problem by listing the given genotypes, test crosses, and genotypic and phenotypic ratios. A plant with serrated leaf margins is crossed with a plant with smooth leaf margins, producing a plant with wavy leaf margins. What will be the phenotypic and genotypic ratios if a homozygous plant with serrated leaves is crossed with a plant with wavy leaves?Monohybrid Cross: 1) In dogs, wire hair (S) is dominant to smooth (s). a. In a cross between a homozygous wire-haired dog with a smooth haired dog what are the genotypes and phenotypes of the F1 generation? b. If a brother and sister from the F1 generation are crossed what is the expected ratio of wire-haired to smooth-haired dogs produced from this cross?Make sure to include (genotypic ratios) For part A) make sure to have table or the phenotypic or genotypic ratios 5. In garden peas, green pod (P) is dominant to yellow pod (p) and tall stemmed (T) plants are dominant to short stemmed plants (t). Please give the genotypic and phenotypic ratios from the following crosses. a) Homozygous green pod homozygous tall stemmed plant crossed with a yellow pod (homozygous) short stemmed (homozygous) plant. b) Homozygous green pod homozygous tall stemmed plant crossed with a heterozygous green pod heterozygous tall stemmed plant. c) Heterozygous green pod heterozygous tall stemmed plant crossed with a heterozygous green pod heterozygous tall stemmed plant. d) Heterozygous green pod homozygous tall stemmed plant crossed with a yellow pod (homozygous) homozygous tall stemmed plant. These are dihybrid crosses. 7. In pea plants, flower colour and pollen shape are located on the same chromosome. A plant with purple flowers and…
- type P = n! (p)* (q)"* х! (n - х)! Practice Problem: You cross a true-breeding pea plant with red flowers to a true-breeding pea plant with white flowers. All of your offspring have red flowers. Which gene is dominant? Why? What is the genotype of your offspring? You then cross the offspring to each other. What ratio do you expect? Why? You count 1000 plants and look at their flowers. Your results are as follows: 740 red 260 white Does this follow a simple Mendelian inheritance pattern? Why or why not? DADT 2 MEA SUDI ND D LUT IONS1. 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.Purple flowers are dominant to white flowers. Identify the phenotypefor the following genotype Ff, FF, ff and determine if the genotype is heterozygous or homozygous. * For each row, you should select two columns. Purple flowers White flowers Heterozygous Homozygous Ff FF ff Brown eyes are dominant to blue eyes. Identify the phenotype for the following genotype BB, Bb, bb and determine if the genotype is heterozygous or homozygous. * 口 ロ口
- 2. 3 1. In radishes, flower color may be red, purple, or white. The edible portion of the radish may be long or oval. When only flower color is studied, no dominance is evident, and red x white crosses yield all purple. Determine the appropriate allele symbols and indicate which genotypes lead to which a. phenotypes. b. If the F1 purple plants described above are interbred, what will be the genotype and phenotype ratios in the F2 generation? C. Regarding radish shape, long is dominant to oval in the typical Mendelian fashion. What will be the phenotype ratios in the F2 generation of a cross between a true-breeding red, long radish and a white, oval radish?Solve the following genetic problems involving monohybrid crosses. You must pick the right letter to represent the gene in the question. You must showW your work using the Punnett square. 1. In pea plants, tall is dominant to dwarf. What are the phenotypic ratios of the offspring when a tall plant heterozygous for height is crossed with a dwarf plant? 2. Crossings between pea plants produced the following results. What is the genotype of the parents of each cross? a. Tall x Tall produced 95 tall, 29 dwarf. b. Tall x Tall produced 83 tallI, O dwarf. c. Tall x dwarf produced 73 tall, 0 dwarf.Answer the following with a short solution if needed: a. The gametes of a worm's genotype SsYy should produce what genotypes? b. A genetic cross between two F1-hybrid rose plants having yellow petals will yield what percent green-petal plants in the F2 generation? Yellow petals are dominant to green. c. Brown fur is dominant over light-colored fur. What is the phenotype of the resulting offspring if you cross a heterozygous brown fur and a light-colored fur?
- A. Select and assign symbols for the genes involved, and determine the genotypes of the parents and offspring in each cross. Pigeons may exhibit a checkered or plain color pattern. In a series of controlled matings, the following data were obtained. F1 Progeny P1 Cross Checkered Plain 1. (a) checkered x checkered 36 0 2. (b) checkered x plain 38 0 3. (c) plain x plain 0 35 Then F1 offspring were selectively mated with the following results. (The P1 cross giving rise to each F1 pigeon is indicated in parentheses.) F2 Progeny F1 x F1 Cross Checkered Plain 4. checkered (a) x plain (c) 34 0 5. checkered (b) x plain (c) 17 14 6. checkered (b) x checkered (b) 28 9 7. checkered (a) x checkered (b) 39 0For the cross: PpAa x PpAa P = purple flowers (Dominant) p = white flowers A = axial flowers (Dominant) a = terminal flowers a. What are the possible gamete classes that can form from these parents? b. What are the expected offspring genotype classes and ratios/proportions/fractions which will result from the cross? c. What are the expected offspring phenotype classes and ratios/proportions/fractions which will result from the cross? 2. Predict ratios/proportions/fractions of genotypes and phenotypes of the following crosses. T = tall stem t = dwarf stem P = purple flowers p = white flowers G = green pods g = yellow pods A = axial flowers a = terminal flowers R = round peas r = wrinkled seeds A. ttPp x Ttpp B. GgRr x ggRr C. PpGg x ppggUse Punnett squares in solving the following problems. 1. In garden peas, a plant that is homozygous for round seeds is crossed with a plant that is heterozygous. Interpret the result of the cross. What percentage of plants will have round seeds? What is the chance of the offspring being heterozygous? Give the phenotypic and genotypic ratios. Give the phenotypes and genotypes. Explain the results of the offspring.