A plant heterozygous for stem height and nomozygous dominant for flower color is crossed with another plant recessive for both traits. What will the ratio of offspring be in the F1 generation? What genotypes in a parental generation will produce a 9:3:3:1 phenotypic ratio in offspring? Show your work.

A plant heterozygous for stem height and nomozygous dominant for flower color is crossed with another plant recessive for both traits. What will the ratio of offspring be in the F1 generation? What genotypes in a parental generation will produce a 9:3:3:1 phenotypic ratio in offspring? Show your work.

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 scientist pollinates a true-breeding pea plant with violet, terminal flowers with pollen from a true- breeding pea plant with white, axial flowers. Which of the following observations would most accurately describe the F2 generation? 75% violet flowers; 75% terminal flowers 75% white flowers in a terminal position 75% violet flowers; 75% axial flowers 75% violet flowers in an axial position
Which of the following situations does not follow the Law of Independent Assortment? A blond man and a brunette woman produce three offspring over time, all of who have blond hair A white cow crossed with a brown bull produces roan cattle Mating a hog with a sow produces six female piglets Men are more likely to experience hemophilia than women.
In sweet pea plants, an allele for purple flowers. (P) is dominanl when paired with a recessive allele for red flowers (p). An allele for Jang pollen grains (L) is dominant when paired with a recessive allele for round pollen grains (L). Bateson and Punnett crossed a plant having purple flowers and long pollen grains with one having white flowers and round pollen grains. All F1 offspring have purple flowers and long pollen grains. Among the F2 generation, the researchers observed the following phenotypes: 296 purple flowers/long pollen grains 19 purple /lower/ round pollen grains 27 red flowers/long pollen grains 85 red flowers/round pollen grains What is the best explanation for these results?
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.
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 long pollen (AaBb) is crossed with one that is recessive for both traits (aabb). Calculate the…
What is the order of genes on the chromosome?22. In the tubular flowers of foxgloves, wild-typecoloration is red while a mutation called whiteproduces white flowers. Another mutation, calledpeloria, causes the flowers at the apex of the stemto be huge. Yet another mutation, called dwarf,affects stem length. You cross a white-floweredplant (otherwise phenotypically wild type) to aplant that is dwarf and peloria but has wild-typered flower color. All of the F1 plants are tall withwhite, normal-sized flowers. You cross an F1 plantback to the dwarf and peloria parent, and you seethe 543 progeny shown in the chart. (Only mutanttraits are noted.)dwarf, peloria 172white 162dwarf, peloria, white 56wild type 48dwarf, white 51peloria 43dwarf 6peloria, white 5a. Which alleles are dominant?b. What were the genotypes of the parents in the original cross?c. Draw a map showing the linkage relationships ofthese three loci.d. Do the data provide evidence for interference? Ifso, calculate the…
34-35 In pea plants, green pods are dominant over yellow pods. Two plants with green pods are crossed. All the offspring plants are counted and pod colors recorded. It is discovered that the F1 generation consists of 123 individuals, of which, 92 have been found to have green pods and 31 were found to have yellow pods. What is the genotype of the plants in the F1 generation with yellow pods? What are the most likely genotypes of the parent 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…
10. In pea plants, seed shape and seed color are controlled by genes located on different chromosomes. Seeds may be round (R) or wrinkled (r), with the allele for round seeds being dominant. Alleles for seed color are yellow and green, with the green allele (y) recessive to the yellow (Y) allele. If you cross an individual that is homozygous round and yellow with an individual that is homozygous for wrinkled and green, what is the genotype of the F1 individuals? Set up a Punnett square for the dihybrid cross.
Ch. 13-8 In sweet pea plants, an allele for purple flowers (P) is dominant when paired with a recessive allele for red flowers (p). An allele for long pollen grains (L) is dominant when paired with a recessive allele for round pollen grains (l). Bateson and Punnett crossed a plant having purple flowers and long pollen grains with one having white flowers and round pollen grains.All F1 offspring have purple flowers and long pollen grains. Among the F2 generation, the researchers observed the following phenotypes:296 purple flowers/long pollen grains19 purple flowers/round pollen grains27 red flowers/long pollen grains85 red flowers/round pollen grainsWhat is the best explanation for these results?
34 a,b Note that the starting heterozygous plant does not have its parents genotypes listed. However, we can determine that the starting heterozygous plant has S,U,tu alleles on one chromosome and s,u,Tu alleles on the other because they are most common combinations in the offspring.
EXTRANUCLEAR INHERITANCE 1. In the four o’clock plant Mirabilis jalapa, leaf color is governed by organelle inheritance of either chloroplasts (green) or leucoplasts (white), or both (variegated). What are the F1 phenotypes from the following crosses: