You are mapping three loci in Brandywine apricot trees (Prunus brandybucki), an important agricultural species in the Shire. In Brandywine apricot trees, sour fruit (fr+) is dominant to fishy-tasting fruit (fr), blue flowers (b+) is dominant to yellow flowers (b), and short, bushy height (sh+) is dominant to tall, tree-like height (sh). You perform a testcross with a plant that is heterozygous for all three loci and get the following offspring:

You are mapping three loci in Brandywine apricot trees (Prunus brandybucki), an important agricultural species in the Shire. In Brandywine apricot trees, sour fruit (fr+) is dominant to fishy-tasting fruit (fr), blue flowers (b+) is dominant to yellow flowers (b), and short, bushy height (sh+) is dominant to tall, tree-like height (sh). You perform a testcross with a plant that is heterozygous for all three loci and get the following offspring:

Name: You are mapping three loci in Brandywine apricot trees (Prunus brandyb
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Description: You are mapping three loci in Brandywine apricot trees (Prunus brandybucki), an important agricultural species in the Shire. In Brandywine apricot trees, sour fruit (fr+) is dominant to fishy-tasting fruit (fr), blue flowers (b+) is dominant to yell

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter12: Mendel, Genes, And Inheritance

Section: Chapter Questions

Problem 3ITD: Half of the worlds population eats rice at least twice a day. Much of this rice is grown in flooded...

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Figure 19-16 shows the results of a QTL fine-mapping experiment. Which gene would be implicated as controlling fruit weight if the mean fruit weight for each linewas as follows?Line Fruit weight (g)1 181.42 169.33 170.74 171.25 171.46 182.27 180.68 180.79 181.810 169.3
Applying the Hardy-Weinberg equilibrium. In a population of flowers, the following color distribution was noted: 36% red (RR), 48% brown-red (Rr), and 16% fuschia (rr). What will be the distribution of genotypes in the next generation?
There are two incomplete-dominant alleles for petal color in a population of flowers. 36% of the flowers have red petals, 16% of the organisms have white petals, and 48% of the flowers have pink petals. What percentage of alleles in this population code for red petals (R)? how can i calculate it?
Half of the worlds population eats rice at least twice a day. Much of this rice is grown in flooded conditions, and different strains of rice are tolerant (survive) or intolerant (die) under these conditions. Rice breeders used genetic crosses to test whether tolerance to flooding is a dominant trait. Researchers used three true-breeding flood-tolerant strains, FR143, BKNFR, and Kurk, and two true-breeding flood- intolerant strains, IR42 and NB, in the crosses. Results were obtained from three sets of crosses and are reported in the Table below: Results of cross of F1 to tolerant parent: F1 plants were crossed with the tolerant parent of the cross. Number of Plants Progeny Analyzed from Intolerant Tolerant Cross Alive Dead Total 1. F2 results of cross: IR42 FR13A 187 77 264 IR42 BKNFR 192 73 265 NB Kurk 142 52 195 2. Results of cross of F1 to intolerant parent: (F1 of IR42 FR13A) IR42 14 17 31 (F1 of IR42 BKNFR) IR42 15 10 25 (F1 of NB Kurk) NB 21 35 56 3. Results of cross of F1 to tolerant parent: (F1 of IR42 FR13A) FR13A 31 0 31 (F1 of IR42 BKNFR) BKNFR 28 0 28 (F1 of NB Kurk) Kurk 40 0 40 Do the data support the hypothesis that the tolerance trait is dominant? Justify your conclusion by explaining the results from each of the three sets of crosses in terms of genotypes and phenotypic ratios. Source: T. Setter et al. 1997. Physiology and genetics of submergence tolerance in rice. Annals of Botany 79:6777.
Now that you know the heritability, what does this mean about trunk height? What would you learn if you repeated the experiment you suggested with different soil & water levels, etc? Answer these questions in at least 3 full sentences.
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?
Based on these results, what are the phenotypes for Parent 1 (P1) and Parent 2 (P2)? Seed Type Initial Number of Seeds Number of Seedlings Seedlings Without Purple Pigment Seedlings With Purple Pigment Seedlings With Green Leaves Seedlings With Yellow-Green Leaves Recessive Trait Dominant Trait Dominant Trait Recessive Trait P1 10 10 10 0 10 0 P2 10 9 0 9 5 4 F1 10 10 3 7 3 0 F2 30 30 15 15 15 15
The expected phenotypic ratio for leaf shape and fruit colour genes is 9:3:3:1, if both genes are on different chromosomes and assort independently during gamete formation. The information below represents two sets of data collected from the above cross. Data Set 1 is from a population of 5000 tomato plants and Data Set 2 is from a population of 50 tomato plants. Phenotypes Observed Probabilities Data Set 1(N = 5000) Data Set 2(N = 50) Regular Red 0.58 0.050 Regular Yellow 0.16 0.29 Potato Red 0.20 0.050 Potato Yellow 0.060 0.61 A. Compare both data sets to the expected probabilities. Are there any significant differences between the observed results and the expected results? Explain. B. Are the genes for leaf shape and fruit colour assorting independently? Explain.
After the plants had grown to maturity and formed seed, seeds were collected from plants with either the shortest and or the longest corollas in the population and planted separately in the greenhouse. When flowers were formed it was found that the variance of the plants with the shortest flowers was now 4.2 while that of the flowers from the longest seeds had become 13.7 Calculate the new values for heritability in the different groups of plants and explain why this difference may arise.
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In eggplants, fruit color is due to two alleles with the Purple allele (CP) incompletely dominant over White (CW). Plants that are heterozygous for this allele produce light violet colored fruit. A biologist surveys a field of eggplants that has been left alone for several years, allowing the eggplants to reproduce and grow without harvesting or disturbance. She finds that 600 of the plants make purple fruits, 200 make light violet fruits, and 200 produce white fruits. Calculate p (fraction of CPalleles in the populations): Calculate q (fraction of CWalleles in the populations): If this population of plants is at Hardy-Weinberg Equilibrium, what fractions (round to two decimal places) of the next generation of egg plants will produce Purple, White, and Violet fruits? Purple: Violet: White: If the frequency of white alleles was actually much higher in next generation than expected, and continued to increase in future generations, and the population stays relatively large, what type of…
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