Now cross two of the F₁ offspring.Parent 1Od BrGametesOR, OrF2 OffspringParent 2Od hrGametesd, dr24. What is the phenotypic ratio in the F2 generation?25. In the dihybrid cross you have considered two traits at a time. Although the number oftraits has increased by one, what has happened to the number of possible phenotypes ofoffspring produced in the F2 generation? For21. What are the genotypes of the F2 generation.Of the F₁ generation.Of the parents22. If it were possible, how would you determine whether a tall individual is heterozygous orhomozygous?23. How do the observed phenotypes of your seedlings compare with the expected F2 ratio?To calculate your expected ratio numbers given the total number of seedlings that you counteduse the following steps:A. Determine your expected ratio. For a monohybrid cross between two F1 plants, bothheterozygous for the trait, you would expect a 3:1 ratio. If you add 3+1, it equals 4.Therefore, each category is a fraction of 4. This means that you expect the followingfractions 3/4 and 1/4 for the two phenotypic class.B. Determine your total number of corn plants actually counted.C. Multiple each fraction by the total number of seedlings you actually counted.a. For example, if you counted 85 seedlings, you would expect the following:i. 3/4 X 85= 64 tall seedlingsii. 1/4 X 85 = 21 dwarf seedlingsD. Add the 2 resulting numbers to verify that they add up to your total numberE. Compare the 2 resulting numbers (your expected numbers) to your actual numbers usingChi Square statistical analysis (to be completed later in Exercise III).Exercise II: Dihybrid CrossDihybrid crosses involve the inheritance of two different traits. Using the same stepslisted above in the monohybrid crosses, fill in the outline below for the following dihybrid cross.A tall (dominant) TT, broad-leaf (recessive) bb plant is crossed with a short (recessive) tt,narrow-leaf (dominant) BB plant.Parent 1GametesF₁ OffspringParent 2Gametes67

Name: Now cross two of the F₁ offspring.Parent 1Od BrGametesOR, OrF2 Offspr
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Description: Now cross two of the F₁ offspring.Parent 1Od BrGametesOR, OrF2 OffspringParent 2Od hrGametesd, dr24. What is the phenotypic ratio in the F2 generation?25. In the dihybrid cross you have considered two traits at a time. Although the number oftraits h

A dihybrid cross, is a genetic cross involving two pairs of contrasting traits or alleles in…

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Now cross two of the F₁ offspring. Parent 1 Od Br Gametes OR, Dr F2 Offspring Parent 2 Od hr Gametes dR dr 24. What is the phenotypic ratio in the F2 generation? 25. In the dihybrid cross you have considered two traits at a time. Although the number of traits has increased by one, what has happened to the number of possible phenotypes of offspring produced in the F2 generation?

Now cross two of the F₁ offspring. Parent 1 Od Br Gametes OR, Dr F2 Offspring Parent 2 Od hr Gametes dR dr 24. What is the phenotypic ratio in the F2 generation? 25. In the dihybrid cross you have considered two traits at a time. Although the number of traits has increased by one, what has happened to the number of possible phenotypes of offspring produced in the F2 generation?

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter12: Mendel's Experiments And Heredity

Section: Chapter Questions

Problem 9RQ: A scientist pollinates a true-breeding pea plant with violet, terminal flowers with pollen from a...

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a. What type of trait is this? How many genes and alleles are involved? Explain your answer. b. What are the genotypes of the 90 and 100 cm plants respectively in the parental generation? c. What is the possible genotype, or genotypes, of the 95 cm class in the F2? c. What is the possible genotype, or genotypes, of the 95 cm class in the F2?
. In nature, the plant Plectritis congesta is dimorphic forfruit shape; that is, individual plants bear either winglessor winged fruits, as shown in the illustration.Wingless fruit Winged fruitPlants were collected from nature before floweringand were crossed or selfed with the following results:Number of progenyPollination Winged WinglessWinged (selfed) 91 1*Winged (selfed) 90 30Wingless (selfed) 4* 80Winged × wingless 161 0Winged × wingless 29 31Winged × wingless 46 0Winged × winged 44 0*Phenotype probably has a nongenetic explanation.Interpret these results, and derive the mode ofinheritance of these fruit-shaped phenotypes. Usesymbols. What do you think is the nongeneticexplanation for the phenotypes marked by asterisks inthe table?
Instructions: Answer the following problem using the punett square and identify its Genotypic ratio and Phenotypic ratio. 1. A homozygous round-seeded plant (RR) is crossed with a homozygous wrinkle-seeded plant (rr). What is the phenotypic and genotypic ratio of their offspring? Genotypic Ratio Phenotypic Ratio- 2. A heterozygous green-colored pod (Gg) is crossed with a yellow-colored pod (gg). Predict the Genotypic and Phenotypic ratio of their offspring. Genotypic Ration Phenotypic Ration
incomplete dominance What is the phenotype of the plant with RR genotype? What is the color of a plant with R'R' genotype? What is the color of a plant with genotype RR'? A pink-flowered snapdragon was crossed with a white-flowered snapdragon. What is the probability of producing a pink-flowered plant? What cross will produce the most pink-flowered plants?
yellow normal-54 yellow opaque-19 white normal- 15 white opaque-8 1. Diagram the hybrid cross showing the segregation of genes responsible for endosperm type andendosperm color in corn. Indicate all applicable gene relationships. Indicate the genotypes,phenotypes and gametes of individuals involved in all crosses. Derive the genotypic and phenotypicratios of the F2 generation using the branching method. 2. Interpret the result of your Chi-squared test.1. How many gene pairs wereresponsible for endosperm type andendosperm color in corn?2. What gene interaction was presentin the genes for the said traits?3. What are the dominant phenotypesfor each trait?4. What are the recessive phenotypesfor each trait?5. Are the genes independentlysegregating?6. What are the possible genotypes ofthe P1 and P2 that produced this F2population?7. Indicate your gene notation 3. Give the possible genotypes of each of the observed phenotypes in your sample. Determine thepossible genotypes of the parents of…
Seedless watermelons that you find in the supermarketare triploids, where x = 11.a. At what frequency are balanced gametes generatedby triploid watermelons?b. What is the probability that a particular seed in atriploid watermelon will be viable? (Recall that aviable seed is a euploid zygote.)c. What is the ploidy of the viable seed in part (b)?More than one answer may apply
23. In garden peas, tallness (T) is dominant to shortness (t) and axillary flowers (A) are dominant to terminal flowers (a). What are the expected genotypes and phenotypes of the offspring if a heterozygous tall, heterozygous axillary plant is crossed with a heterozygous tall, terminal plant? Give your answers in probabilities (%). a. What are the genotypes of the parents? b. Complete the dihybrid cross: C. What are the phenotype ratios?
Activity 4 Identification of phenotype of known genotype The characteristic of the color of the red tomato fruit (R) is dominant over the characteristic of the yellow color (r) The characteristic of the color of white flowers (W) is dominant over the characteristic of the color of the yellow flowers (w), and the characteristic length of the stem of the plant (T) is dominant over the short characteristic (t) If a red fruit plant with yellow and long-stemmed flowers is crossed, with anotheryellow, white-flowered and short-stemmed plant, knowing that the dominant characteristic is pure. What is the phenotype of individuals of the resulting generation?
7-5. In corn a pair of genes determines leaf shape and another pair determines pollen shape. A ragged-leafed plant with round pollen was crossed to a ragged-leafed plant with angular-pollen, and the resultant progeny were classified as follows: Class Phenotypes 186 ragged-leaf round-pollen 11 IV 174 ragged-leaf angular-pollen 57 smooth-leaf round-pollen Total 63/480 smooth-leaf angular-pollen (a) Using alphabetical letters of your choice, designate the genes for the different leaf and pollen characters. (b) On the basis of the symbols given in (a) 1 provide genotypes two parents. (c) (forth)/(nbers) According to your hypothesis what would you have expected for each of the four classes of progeny? (d) After re viewing Chapter 8, use the chi-square method (p. 132) to test your hypothesis and indicate whether you accept or reject it.
Topic: Trihybrid Cross, Height in merigonias is determined by three unlinked genes that act additively. Each has two alleles, one compltely dominant allele(A,B or C) that makes plants taller and one recessive allele that makes plants shorter. Do the corss AaBbCc X AaBbCc. The fraction of The F1 progenty will be ? Pls explain it with more details. thanks
. Jimsom. weed plants can produce purple or white flowers and spiny or smooth seed pods. A purple spiny plant is crossed with a white spiny plant. This cross produces: 89 purple spiny; 92 white spiny; 31 purple smooth and 27 white smooth plants. What are the genotypes of the parental plants and the progeny plants? Use the letters P/p for flower color and S/s for pod texture Parent #1 –genotype:_________________________________; Parent #2 –genotype: ______________________________ b. Offspring plants – genotypes and phenotypes c. Calculate the recombination frequency using these results_________________________________ i need help finding the right answer and i need an explation on how you got it so i understand and please do it with a punnet square and show the calutions step by step
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