To analyze: Imagine the length of the maize ears which has narrow sense heritability (h²) of 0.70 A population yields ears that have an average length of 28 cm, and a breeder selects a plant harvesting 0.70 cm ears from this population and cross by self-fertilization. Find the expected selection differential (S) and the response to

To analyze: Imagine the length of the maize ears which has narrow sense heritability (h²) of 0.70 A population yields ears that have an average length of 28 cm, and a breeder selects a plant harvesting 0.70 cm ears from this population and cross by self-fertilization. Find the expected selection differential (S) and the response to

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter19: Population Genetics And Human Evolution

Section: Chapter Questions

Problem 10QP

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Calculate selection for the following scenario. In a population of prairie dogs living on a prairie, prairie dogs with genotype aa have 8 offspring per year on average, those with genotype Aa have 4 offspring per year on average, and those with genotype AA have 3 offspring per year on average. Round selection to the nearest hundredth, report selection as a value ranging from "0.00" to "1.00" Selection on genotype Aa: Selection on genotype AA: Selection on genotype aa: Which genotype has the highest fitness? Fill in the blank with homozygous dominant, heterozygous, or homozygous recessive
The narrow-sense heritability for a trait is 0.4 and the selection differential is 0.5. What isthe predicted response to selection?
Imagine a population 528 individual plants. In this population, 4 % of the plants produce red flowers, and 9 % produce pink flowers. The remaining plants produce white flowers. Flower colour is attributed to a single locus with two alleles. Red flowers are produced by plants that are homozygote for the R allele. White flowers are produced by plants that are homozygote for the W allele. Heterozygotes (RW) produce pink flowers. What is the expected (under Hardy-Weinberg equilibrium) number plants producing pink flowers in this population? Round your answer to the closest full number.
Different species of crickets have distinct songs, andthey use these songs for mate recognition. Researcherscrossed two species of Hawaiian crickets (Laupala paranigra and L. kohalensis) whose songs are distinguishedby pulse rate (the number of pulses per second; Shaw etal., Molecular Ecology 16, 2007, 2879–2892.) Then, theymapped QTL in the F2 population derived from thiscross. Six autosomal QTL were detected. The mean traitvalues (pulses per second) at the three genotypic classesin the F2 for each QTL are shown in the table below,where P indicates the L. paranigra allele and K indicatesthe L. kohalensis allele.a. Calculate the additive (A) and dominance (D) effectsand the D/A ratio for each of the six QTL.b. Which of these QTL shows the greatest amount ofdominance?c. Which of these has the largest additive effect?d. The mean pulse rate for L. kohalensis is 3.72, and it is0.71 for L. paranigra. Do all six QTL act in the expecteddirection with the L. kohalensis allele conferring a…
Consider a greenhouse with 500 carnation plants. 280 plants are homozygous for the red allele (RR), 120 plants are heterozygous (Rr), and 100 plants are homozygous for the white allele (rr). What is the frequency of the red allele? What is the frequency of the white allele?
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Among a particular population of 100 plants, red flowers are dominant and yellow flowers are recessive. F is the dominant allele and f is the recessive allele. 40 plants are homozygous dominant • 44 plants are heterozygous 16 plants are homozygous recessive Use the Hardy-Weinberg equation to calculate the equilibrium frequencies of each genotype
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How is the response to selection related to narrow-sense heritability andthe selection differential? What information does the response toselection provide?
In a horse population, three different traits showing continuous distribution were measured,and their variances are shown in the table below:(see image) 1. Calculate the broad sense and narrow sense heritabilities for each trait.2. In the population of animals studied, which trait would respond best to selection for breeding purposes? Explain your answer.