2. A red snapdragon is crossed with a white snapdragon plant. Red pigment is incompletely dominant and white has no pigments and is recessive. Please draw the genetic chart to show the genotypes and phenotypes of P, Fl and F2 if F1 plants crossbred with each other. are
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- Two pairs of traits are segregating in a cross. Two parents produce 156 progeny that fall into 4 phenotypes. The numbers of offspring in the 4 phenotypes are 89, 31, 28, and 8. What are the genotypes of the two parents?Several alleles affect traits of roses, such as plant form and bud shape. Alleles of one gene govern whether a plant will be a climber (dominant) or shrubby (recessive). All F1 offspring from a cross between a true-breeding climber and a shrubby plant are climbers. If an F1 plant is crossed with a shrubby plant, about 50 percent of the offspring will be shrubby; 50 percent will be climbers. Using symbols A and a for the dominant and recessive alleles, make a Punnett- square diagram of the expected genotypes and phenotypes the cross between the F1 offspring and the shrubby plant.4. What are the possible phenotypes and genotypes of the F1 generation if the P generation consisted of the following cross: a plant that is homozygous dominant for flower color and homozygous dominant for pod color was crossed with a plant that is heterozygous for flower color and homozygous dominant for pod color? Dominant for flower color – P (purple) Recessive for flower color = p (white) Dominant for pod color =G (green) Recessive for pod color = g (yellow) %3D P1: PP X GG Рр X GG PG PG PG PG PG PPGG PPGG PPGG PPGG PG PPGG PPGG PPGG PPGG PPGG PPGG Pp pG PPGG PpGG PPGG PpGG Genotypes: Phenotypes: Genotypic Ratio: Phenotypic 田
- 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.9. Radishes may be long, round, or oval in shape and red, white, or purple in colour. A long white variety crossed with a round red one produced oval, purple Fi's. The F2 progeny of F1 selfing comprised nine phenotypic classes as follows: long, red long, purple long, white round, purple 9 8 15 16 oval, red 19 round, white 8. oval, purple oval, white 32 16 round, red 9 (a) Explain the pattern of inheritance. (b) Give the genotypic and phenotypic ratios expected among the progeny of crosses between: A long, purple and an oval, purple plant. An oval, purple plant and a round, white plant How many true-breeding varieties of radish could be established?1. Alleles of the gene that determines seed coat patternsin lentils can be organized in a dominance series:marbled > spotted = dotted (codominant alleles) >clear. A lentil plant homozygous for the marbled seedcoat pattern allele was crossed to one homozygous forthe spotted pattern allele. In another cross, a homozygous dotted lentil plant was crossed to one homozygous for clear. An F1 plant from the first cross wasthen mated to an F1 plant from the second cross.a. What phenotypes in what proportions are expectedfrom this mating between the two F1 types?b. What are the expected phenotypes of the F1 plantsfrom the two original parental crosses?
- 1. P is a dominant allele for purple flowers and p is the recessive allele that causes white flowers. The following cross is performed: Pp x pp. What percentage of offspring would you expect to have white flowers? 2. In peas, T (tall) is dominant to t (dwarf). A homozygous dominant plant is crossed to a heterozygous plant. What is the expected outcome for the genotype ratio of offspring from this cross? What percentage of offspring would you expect to be tall? 3. In peas, Y (yellow seeds) is dominant to y (green seeds) and R (round seeds) is dominant to r (wrinkled seeds). The following cross is performed: YYRr x yyrr. What is the expected phenotype ratio of the offspring?1. Imagine you have crossed a pure breeding purple flower and pinched pod shape pea plant with a pure breeding white flower and round pod shape pea plant. What would the phenotype be with respect to the flower color and the pod shape in the F1 generation? ” 2. If one of the F1 was allowed to cross-fertilize, what would be the possible phenotypes in the F2 and how many of each phenotype would you predict out of a total of 200 F2 progeny?”1. A farmer crossed a round-shaped (T) and yellow-colored (Y) seed plant carrying yellow seeds (Y) and a wrinkled (t) and green-colored (g) seed plant. The traits of first plant is dominant over the second one. Fertilization of the first generation plants produced a total of 16 offsprings of the plants. What will be the genotypes and phenotypes of the offsprings. (Use punnette square to answer the question) Heterozygous lines for this cross Also, list up the Homozygous and
- 1. Fine spines (s), smooth fruit (tu) and uniform fruit color (u) are three recessive traits in cucumbers, the genes for which are linked on the same chromosome. A cucumber plant heterozygous for all three traits is used in a testcross, and the following progeny are produced by this testcross: S U Tu 2 s u Tu 70 S u Tu 21 s u tu 4 S U tu 82 s U tu 21 s U Tu 13 S u tu 17 Total=230 a) Determine the order of these three genes on the chromosome. b) Calculate the map distances between the genes. Show work.1. In "Four o' Clock “plants, it's flower color is incompletely dominant. The red flowers are homozygous dominant, the white flowers are homozygous recessive, and the pink flowers are heterozygous. Show genetic crosses between the following Four O'clock parents, using the Punnett squares provided and indicate the genotypic and phenotypic % below: A. Red x white Genotypic %: Phenotypic %: B. White x Pink Genotypic %: Phenotypic %: C. Pink x Pink Genotypic %: Phenotypic %: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.…