Concept explainers
a.
To formulate: The concise genetic hypothesis, which explains the results of the blotched leaves and the symbols which show the classes of genotypes.
Introduction: The plant which has grown on Vancouver and British Columbia Mainland exhibit the dimorphism in the leaves notch in most of the leaves. Blotches are the irregular patterns of spots present on the leaves. The plant with no flowering was estimated by the scientists, to distinguish among recessiveness and dominance characters in progenies of the leaves at random.
b.
To test: The determined and specific hypothesis about the approval of the traits.
Introduction:
The plant, which was not able to be flowered under the natural and environmental soil conditions, was taken for the examination in the laboratory to define the character, which plant was exhibiting in dominance or which was exhibiting the recessive character. The crossing was performed in the laboratory so that the primary and dominant character of the parent plants can be determined.
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Introduction to Genetic Analysis
- You successfully isolate an hsf2/hsf2; hsf3/hsf3 double mutant stock. You cross this plant to an hsf1/hsf1 plant and then self-pollinate the F1. You want to recover at least 10 triple mutant homozygous to evaluate the phenotype. How many plants do you need to genotype to expect to recover 10 triple mutant plants?arrow_forwardIn corn, a triple heterozygote was obtained carrying themutant alleles s (shrunken), w (white aleurone), andy (waxy endosperm), all paired with their normal wildtype alleles. This triple heterozygote was testcrossed, andthe progeny contained 116 shrunken, white; 4 fully wildtype; 2538 shrunken; 601 shrunken, waxy; 626 white;2708 white, waxy; 2 shrunken, white, waxy; and 113 waxy.a. Determine if any of these three loci are linked and,if so, show map distances.b. Show the allele arrangement on the chromosomesof the triple heterozygote used in the testcross.c. Calculate interference, if appropriate.arrow_forwardA snapdragon with pink petals, black anthers, and longstems was allowed to self-fertilize. From the resultingseeds, 650 adult plants were obtained. The phenotypesof these offspring are listed here.78 red long tan26 red short tan44 red long black15 red short black39 pink long tan13 pink short tan204 pink long black68 pink short black5 white long tan2 white short tan117 white long black39 white short blacka. Using P for one allele and p for the other, indicatehow flower color is inherited.b. What numbers of red : pink : white would havebeen expected among these 650 plants?c. How are anther color and stem length inherited?d. What was the genotype of the original plant?e. Do any of the three genes show independentassortment?f. For any genes that are linked, indicate the arrangements of the alleles on the homologous chromosomes in the original snapdragon, and estimate thedistance between the genesarrow_forward
- The table shows three related species of potato, and the number of chromosomes each species carries in its somatic cells. S. avilesii is diploid. S. tuberosum is the widely cultivated species. Potatoes propagate by asexual reproduction and do not depend only on gametes for reproduction. Species Number of chromosomes in somatic cells S. tuberosum is likely to be a larger, more vigorous plant than S. avilesii. Classify each statement about these potato species as true or false. Gametes produced by S. microdontum contain 18 chromosomes. S. microdontum is aneuploid. S. microdontum is a triploid with 3x chromosomes. Solanum avilesii True 24 The basic chromosome number (x) for these species is 6. S. tuberosum is a tetraploid with 4x chromosomes. Solanum microdontum 36 The basic chromosome number (x) for these species is 12. S. microdontum could have arisen only from a cross between S. avilesii and S. tuberosum. False Solanum tuberosum 48 S. microdontum could have arisen from a cross between…arrow_forwardIn the following diagram, designate each daughter cell as diploid (2n) or haploid (n).arrow_forwardThe picture below represents a G1 cell from a newly discovered species that uses the X/Y sex determination system. Alleles for the different autosomal genes of interest are indicated on the chromosomes, and genes R and T are 36 cM apart. Red lines show maternal chromosomes, and blue lines show paternal chromosomes. Answer the following questions about this individual. a) This individual can produce a pool of different gametes. List any TWO potential gametes that will occur at different frequencies. Give the alleles of each gamete contained within a set of brackets, and indicate the expected frequency (up to two decimals) at which that gamete would occur. b) Name any two loci in this individual that can result in recombination in the gametes via the process of independent assortment. c) What is the sex of this individual? Justify your answer. d) Give the term that will describe the morphology of the chromosome that carries the R/T alleles. e) Provide the genotype of the fertilizing male…arrow_forward
- A man suffered from rare a skin condition that included thickening of the skin and the formation of loose spines that were periodically sloughed off. He was called by the locals as “porcupine man”. He married and had six sons, all of whom had the same condition. He also had three daughters, all of whom were unaffected. What might you theorize about the location of the abnormal gene? In maize, a dominant allele A is necessary for seed color, as opposed to colorless (a). Another gene has a recessive allele wx that results in waxy starch, as opposed to normal starch (Wx). The two genes segregate independently. An Aa WxWx plant is test crossed. What are the phenotypes and relative frequencies of offspring? (show the workflow to reach your answers) all sub-questions carries equal grades): Consider three gene pairs Aa, Bb, and Cc, each of which affects a different character. In each case, the uppercase letter signifies the dominant allele and the lowercase letter the recessive allele.…arrow_forwardA variety of opium poppy (Papaver somniferum L.) with lacerate leaves was crossed with a variety that has normal leaves. All the F1 had lacerate leaves. Two F1 plants were interbred to produce the F2. Of the F2, 249 had lacerate leaves and 16 had normal leaves. Give genotypes for all the plants in the P, F1, and F2 generations. Explain how lacerate leaves are determined in the opium poppy.arrow_forwardLet us suppose that two plants are crossed (mated). One plant (female) is homozygous dominant and produces chlorophyll, and the other (male) is homozygous recessive and does not produce chlorophyll. These two plants are considered the parental, or P generation. What would be the possible genotypes and phenotypes of these two individuals? Fill in the table below with the parental generation's descriptional information. Table 6.1 Female Male Description Parental Generation Homozygous dominant P Generation Genotype gg Phenotype Greenarrow_forward
- A pea plant has a mendilian completely dominant gene for height flower colour phenotype. A pure breeding tall purple flower plant is crossed with a white dwarf plant. All offspring are purple and tall. If one of these offspring are crossed again with the white dwarf plant, what is the chances of producing a tall white flower? Explain your answer and any assumptions that you had to make. Note: You may not need the entire punnett square below or you may wish to use a different method.arrow_forwardthree recessive genes a, b, and c in the model plant Arabidopsis are found to be linked on chromosome 4. A three point test cross is done with a homozygous recessive plant with a heterozygous for all three genes. Following is the number of progenies a b C 65 A B c 56 A B C 1267 a b c 1310 A b C 550 a B c 515 a B C 470 A b c 489 Total = 4,722 Determine the middle locus by your choice of method and after that calculate the map distance between the genes in map unit (m.u.).arrow_forwardChoose which of the following is true: a) Haploid cells have one allele per gene b) Haploid cells have two alleles per genearrow_forward
- Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning