Dominant allele R in corn results in purple kernel, while recessive allele r results in pearl white kermel in homozygous condition. The plant body colour is controlled by another gene with two alternative alleles, G for green colour and g for yellow colour. In a testeross between a com plant with unknown genotype and a plant that is homozygous recessive for both genes, the following progeny were obtained: Phenotype Purple, green Purple, yellow Pearl white, green Pearl white, yellow Number 90 12 10 88
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A: The traits are acquired from parents to offspring by the process of inheritance. Traits of an…
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Q: In peas, the green pod allele (G) is dominant to the yellow pod allele (g). The inflated pod allele…
A: As per the question, G_ = green gg = yellow H_ = inflated hh = constricted
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A: The chi-square analysis is used in different experiment to compare the observed and expected data.…
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A: Recessive character is always expressed in homozygous condition where as dominant character is…
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A: The genotype is defined as a part of the genomic constitution of an organism that controls different…
Q: In the pearl-millet plant, color is determined by three alleles at a single locus: Rp1 (red), Rp2…
A: Zygosity can be either heterozygous or homozygous. Heterozygous has one recessive allele and one…
Q: n corn, purple kernels (P) are dominant over yellow kernels (p) and round kernels (R) are dominant…
A: Please follow step 2 for detailed explanation.
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A: There are two types of crosses: A Monohybrid cross is the type of cross in which only one character…
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A: Introduction Any gene have two alleles pairs viz. Dominant or Recessive. The allele which gets…
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A: A test cross is done between an individual with an unknown genotype and a known individual with a…
Q: . In the tiny model plant Arabidopsis, the recessive allele hyg confers seed resistance to the drug…
A: Model plant = Arabidopsis The recessive allele conferring seed resistance to the hygromycin = hyg…
Q: Consider a two-factor cross between a pure breeding plants: one with purple flowers and yellow seed…
A: It is given that true breeding plants are crossed, purple flower yellow pods and white flower green…
Q: In the pearl-millet plant, color is determined by three alleles at a single locus: Rp1 (red), Rp2…
A: Allele refers to the different forms of same gene, for example, height, it can be tall short or…
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A: A dihybrid cross is a pairing procedure in which two different, genetically determined…
Q: When Mendel set up a Parental (P) cross between true breeding purple and white flowered plants to…
A: The alleles are generally of dominant and recessive type and some other forms like codominant are…
Q: In the pea plant, the green pod color allele is dominant to the yellow pod color allele. Set-up a…
A: The alleles are generally of dominant and recessive type and some other forms like codominant are…
Q: Colored aleurone in the kernels of corn is due to the dominant allele R. The recessive allele r,…
A: Gene is a nucleotide sequence that forms the basic unit of heredity. An allele is a variant form of…
Q: Consider the following cross examining four gene in two parental line: Parent 1: A/a; B/B; D/d; E/e…
A: This is a tetrahybrid cross, meaning a cross involving study of four different genes. The number of…
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A: 3:1. = white:yellow
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A: Parents - (a) homozygous for recessive pod color and heterozygous for pea shape - ggRr (b)…
Q: In the pearl-millet plant, color is determined by three alleles at a single locus: Rp1 (red), Rp2…
A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…
Q: A farmer crossed a tall (T) pea plant carrying yellow seeds and a dwarf pea plant (t) carrying green…
A: Inheritance is the process of transmitting the traits from parent to offspring. Traits of an…
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A: Trait is a characteristic features that is unique to specific individual . Trait can be :- I )…
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A: The test cross is performed in this case. Because the tall plant with purple flower (TtPp) is…
Q: In a certain plant, the orange flower allele (Y) is dominant to the yellow flower allele (y). An…
A: Orange flower allele = Y yellow flower allele= y No flower pigmentation =W flower pigmentation= w…
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A: The genotype is a combination of a gene and the phenotype is the observable characteristic. The…
Q: In cultivated flowers called “stocks,” the recessive genotype of one locus (aa) prevents the…
A: Given: In cultivated flowers called “stocks,” the recessive genotype of one locus (aa) prevents the…
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A: Since recessive allele is represented by (c), hence the phenotype of mentioned persons comes to be :…
Q: Two Mendelian traits in pea plants that are controlled by single genes are the color of the pods and…
A: Sir Gregor Mendel was a priest and a teacher who did the famous hybridization experiment on garden…
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A: According to Mendelian genetics, round shape and yellow color are dominant traits of a pea plant,…
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A: The term “genotype” is defined as the “genetic makeup” of an individual. In other words it can be…
Q: Following the Rule of Non-Mendelian Genetics (Incomplete Dominances), In a genetic cross between one…
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A: For the plant with Heterozygous tall and heterozygous purple flowering plant , genotype will be…
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Q: Two Mendelian traits in pea plants that are controlled by single genes are the color of the pods and…
A: Given: Green pod - Dominant - G Yellow pod - recessive - g Inflated pods - Dominant - I Constricted…
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A: This is a situation involving a quantitative, polygenic trait. There is a basic size of the flower,…
Q: Three recessive traits in garden pea plants are as follows: yellowpods are recessive to green pods,…
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A: The dominant trait is controlled by a dominant allele which is represented by the capital letter.…
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A: According to the question, in California poppy, yellow flower allele(C) is dominant over white…
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A: The presence of two different alleles at a particular gene locus is called heterozygous.
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A: Answer: Phenotypes are characteristics which expresses and can be noticed and seen but genotypes are…
Q: You carry out a trihybrid cross (a cross in which the parental plants differ for three characters)…
A: Trihybrid cross is that in which three contrasting pairs of characters are studied. We are given…
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A: The three laws of Mendel are: Law of dominance - Only the dominant gene expresses itself. The…
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- The text outlines some of the problems Frederick William I encountered in his attempt to breed tall Potsdam Guards. a. Why were the results he obtained so different from those obtained by Mendel with short and tall pea plants? b. Why were most of the children shorter than their tall parents?Mendelian ratios are modified in crosses involving autotetraploids.Assume that one plant expresses the dominant trait greenseeds and is homozygous (WWWW). This plant is crossed to onewith white seeds that is also homozygous (wwww). If only onedominant allele is sufficient to produce green seeds, predict theF1 and F2 results of such a cross. Assume that synapsis betweenchromosome pairs is random during meiosis.In corn, the genes for tassel length (alleles T and t) andrust resistance (alleles R and r) are known to be on separate chromosomes. In the course of making routinecrosses, a breeder noticed that one T/t ; R/r plant gaveunusual results in a testcross with the double-recessivepollen parent t/t ; r/r. The results wereProgeny: T/t ; R/r 98t/ t ; r/r 104T/t ; r/r 3t/t ; R/r 5Corncobs: Only about half as many seeds as usuala. What key features of the data are different from theexpected results?b. State a concise hypothesis that explains the results.c. Show genotypes of parents and progeny.d. Draw a diagram showing the arrangement of alleleson the chromosomes.e. Explain the origin of the two classes of progenyhaving three and five members.
- In garden pea, resistance to a certain disease is controlled by a single locus with dominance forresistance (R) and recessive susceptible (r). Another locus governs seed color with yellow being dominant (Y)to green (y). A pea plant which is heterozygous for both gene pairs is crossed with a susceptible and green-seeded plant. The following data was observed in the progeny. Phenotype NumberResistant yellow 43Susceptible green 49Resistant green 16Susceptible yellow 12Total 120 a. What is the calculated chi-square value based on an independent assortment assumption? Compute forthe df and write the conclusion. (NOTE: The cross will not yield a 9:3:3:1 ratio since not both of theparental genotypes are heterozygous for the 2 pairs of alleles. Thus, perform the cross first, show theparental genotypes, the gamete…If a homozygous tall pea plant is crossed with a homozygous shortpea plant, what are the possible genotype and phenotype of theoffspring? Legend: T- tall pea plant t- short pea plant Genotypes of the parents: TT x tt Question to answer ff: 1. What is the genotypic ratio? 2. What are the possible phenotypes of the offspring? 3. What is the phenotypic ratio?In roses, purple flower color is determined by the dominant P allele, while pp homozygotes are white. The presence of long stems is determined by the dominant S allele, while ss homozygotes have short stems. Both mutations are completely penetrant. A test cross was performed between a rose plant of unknown genotype with a white flowered, short stemmed rose plant (pp ss) and the following 200 progeny plants were obtained: 84 white flowers, long stems 16 purple flowers, long stems 82 purple flowers, short stems 18 white flowers, short stems Select the statements below that are TRUE. Select 2 correct answer(s) The P and S genes independently assort during meiosis. The map distance between P and S is 17 CM. The genotype of the progeny plants with purple flowers and short stems is PP ss. The map distance between P and S is 83 CM. The homologs in the plant with unknown genotype are p S and Ps. The homologs in the plant with unknown genotype are PS and p s.
- In radishes, color and shape are each controlled by asingle locus with two incompletely dominant alleles.Color may be red (RR), purple (Rr), or white (rr) andshape can be long (LL), oval (Ll), or round (ll). Whatphenotypic classes and proportions would you expectamong the offspring of a cross between two plantsheterozygous at both loci?Colored aleurone in the kernels of corn is due to the dominant allele R. The recessive allele r, when homozygous, produces colorless aleurone. The plant color (not the kernel color) is controlled by another gene with two alleles, Y and y. The dominant Y allele results in green color, whereas the homozygous presence of the recessive y allele causes the plant to appear yellow. In a testcross between a plant of unknown genotype and phenotype and a plant that is homozygous recessive for both traits, the following progeny were obtained: colored, green 88 colored, yellow 12 colorless, green 8 colorless, yellow 92 Explain how these results were obtained by determining the exact genotype and phenotype of the unknown plant, including the precise arrangement of the alleles on the homologs.In autotetraploid Chinese primrose (Primula sinensis L.), the gene controlling stigma color is very near the centromere of the chromosome carrying it. The allele G for green stigma is dominant to g for red stigmas. A homozygous green autotetraploid strain is crossed with a homozygous red autotetraploid strain. Each of the F1 GGgg plants would obtain 12 gametes which are 2GG, 8Gg, and 2g. How were these obtained?
- In maize trisomics, n + 1 pollen is not viable. If adominant allele at the B locus produces purple colorinstead of the recessive phenotype bronze and a B b btrisomic plant is pollinated by a B B b plant, whatproportion of the progeny produced will be trisomicand have a bronze phenotype?In roses, purple flower color is determined by the dominant P allele, while pphomozygotes are white. The presence of long stems is determined by the dominant S allele, while ss homozygotes have short stems. Both mutations are completely penetrant. A test cross was performed between a rose plant of unknown genotype with a white flowered, short stemmed rose plant (pp ss) and the following 200 progeny plants were obtained: 84 white flowers, long stems 16 purple flowers, long stems 82 purple flowers, short stems 18 white flowers, short stems Select two statements below that are TRUE. options: The P and S genes independently assort during meiosis. The map distance between P and S is 17 cM. The genotype of the progeny plants with purple flowers and short stems is PP ss. The map distance between P and S is 83 cM. The homologs in the plant with…A trait in garden peas involves the curling of leaves. A two-factorcross was made by crossing a plant with yellow pods and curlingleaves to a wild-type plant with green pods and normal leaves. AllF1 offspring had green pods and normal leaves. The F1 plants werethen crossed to plants with yellow pods and curling leaves. Thefollowing results were obtained: 117 green pods, normal leaves115 yellow pods, curling leaves78 green pods, curling leaves80 yellow pods, normal leavesA. Conduct a chi square analysis to determine if these two genesare linked.B. If they are linked, calculate the map distance between the twogenes. How accurate do you think this calculated distance is?