Which of the following is TRUE regarding quantitative traits? they are always determined by partially dominant alleles, which yield intermediate trait values they are often influenced by the action of many genes they are not heritable a they are often normally distributed in a population they are often influenced by environmental effects

Which of the following is TRUE regarding quantitative traits? they are always determined by partially dominant alleles, which yield intermediate trait values they are often influenced by the action of many genes they are not heritable a they are often normally distributed in a population they are often influenced by environmental effects

Name: Which of the following is TRUE regarding quantitative traits?they are
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Description: Which of the following is TRUE regarding quantitative traits?they are always determined by partially dominant alleles, which yield intermediate trait valuesthey are often influenced by the action of many genesthey are not heritablethey are often nor

Human Biology (MindTap Course List)

11th Edition

ISBN:9781305112100

Author:Cecie Starr, Beverly McMillan

Publisher:Cecie Starr, Beverly McMillan

Chapter19: Introduction To Genetics

Section: Chapter Questions

Problem 9SQ

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Saying that a quantitative trait follows a continuum means thata. the numerical value for the trait increases with the age ofthe individual.b. environmental effects are additive.c. the phenotypes for the trait are continuous and do not fallinto discrete categories.d. the trait continuously changes during the life of an individual.
Which of the following is an example of a quantitative trait?a. Heightb. Rate of glucose metabolismc. Ability to learn a mazed. All of the above are quantitative traits.
A survey was conducted for a certain trait (the ability to roll tongue or inability to roll the tongue) in a population. The result shows that 215 of the respondents can roll their tongue and 85 cannot roll their tongue. The picture below shows a person rolling his tongue. Rolling the tongue into a tube shape is often described as a dominant trait. If the dominant allele is represented by R (can roll tongue) and r represents the recessive allele, calculate the phenotypic frequencies, allele frequencies, the expected numbers of the three genotypic classes and the expected numbers of the two phenotypic classes (assuming random mating). Using chi-square test, determine whether or not this population is in Hardy-Weinberg equilibrium. REMEMBER: Genotype Phenotype HWE term RR and Rr Can roll tongue p2 and 2pq rr Cannot roll tongue q2 Again, follow the format below for your answers. Regarding letter “F” on the format, you will show the computations on how you arrive to the chi-square value…
(Fill in the blank) selection tends to keep a trait the same overtime while (fill in the blank) selection tends to lead to a change in a trait over time. Using the following words fill in the blank: natural, artificial, stabilizing, or directional
Which of the following statements about quantitative genetics is TRUE? Heritability is the measure of the proportion of an individual's phenotype that is due to genetics. QTL mapping provides an overestimate of the number of genes contributing to a quantitative trait. A threshold trait is measured in whole numbers. An H2 value (broad-sense heritability) that approaches 0.0 means that almost all the phenotypic variation is determined by genetic differences. The h2 (narrow-sense heritability) value is a prediction of the impact that selection may have in altering an initial population by artificial selection.
All of the following are considered a quantitative trait, EXCEPT? a. A trait that has a continuously varying phenotype in the population. b. A trait that is influenced by both genetic and environmental factors. c. A trait that has multiple genes that contribute to the phenotype. d. A trait that is influenced by one gene that follows complete dominance inheritance patterns.
Which one of these statements concerning polygenic and multifactorial traits is NOT true? they can either be continuous or discontinuous a smooth gaussian distribution can occur through environmental influences a smooth gaussian distribution can occur through increasing numbers of genes polygenic traits require the additive effect of many genes; multifactorial traits do not
A particular kind of squash comes in one of three shapes (long, oval, or round) and one of three colors(green, yellow, or white). A cross between long green female squash and round white male squashproduced all oval and yellow. Assign alleles to each trait (TIP: which trait is intermediate?): long ______ green_______oval ______ yellow_______round______ white _______
The majority of traits are what? (gene number)
The trait that you are interested in is defined by two alleles, J1 and J2. The frequency of J1 is 0.3 Ibiza and a 0.3 in the continent (Costa Blanca, Spain). You initially collected data for 700 individuals. In five years, you go back and identified that additional 300 individuals migrated from Costa Blanca to Ibiza island. What is the frequency of J2 on the island in the next generation Round up and use four decimal points
A student who has just learned about quantitative genetics says, “Heritability estimates are worthless! They don’t tell you anything about the genes that affect a characteristic. They don’t provide any information about the types of offspring to expect from a cross. Heritability estimates measured in one population can’t be used for other populations, so they don’t even give you any general information about how much of a characteristic is genetically determined. Heritabilities don’t do anything but make undergraduate students sweat during tests.” How would you respond to this statement? Is the student correct? What good are heritabilities, and why do geneticists bother to calculate them?
Polygenic traits are: Group of answer choices Rare, comprising just a few traits. Most traits are monogenic rather than polygenic. Controlled by two or more genes, and include traits such as skin color and height. Controlled by just one gene, and include traits such as ABO blood type or freckles. Usually caused by harmful mutations that lead to disease development.