Use the following to answer questions The height and weight for three dogs are shown below. \(\begin{array}{cc} Weight~ in ~kilograms&Height~ in~ centimeters\\ 7 & 22 \\ 4 & 12 \\ 10 & 30 \end{array}\) -What is the standard deviation of the height? Round to the nearest whole number.

A) 3 B) 9 C) 21 D) 42 E) 81 A) 3 B) 9 C) 21 D) 42 E) 81

Use the following to answer questions The height and weight for three dogs are shown below. \(\begin{array}{cc} Weight~ in ~kilograms&Height~ in~ centimeters\\ 7 & 22 \\ 4 & 12 \\ 10 & 30 \end{array}\) -What is the mean of the weight? Round to the nearest whole number.

A) 7 B) 12 C) 21 D) 22 E) 80 A) 7 B) 12 C) 21 D) 22 E) 80

A) is one of the genes that influences a trait B) is a chromosomal region containing genes that influence a quantitative trait C) will not contain any genes other than the ones influencing a trait D) is a measure of the phenotypic variation in a quantitative trait E) is a measure of the genetic variation in a quantitative trait A) is one of the genes that influences a trait B) is a chromosomal region containing genes that influence a quantitative trait C) will not contain any genes other than the ones influencing a trait D) is a measure of the phenotypic variation in a quantitative trait E) is a measure of the genetic variation in a quantitative trait

A study was conducted to investigate the levels of calcium and growth hormone excreted in chicken dung on a major chicken farm. The variances (V) were calculated and are shown below. \[\begin{array} { c c | c | } \hline \text { Variance } & \text { Calcium } & \text { Growth hormone } \\ \hline V _ { \mathrm { p } } & 321.2 & 95.8 \\ \hline V _ { \mathrm { E } } & 119.7 & 69.4 \\ \hline V _ { \mathrm { A } } & 107.4 & 10.1 \\ \hline V _ { \mathrm { D } } & 94.1 & 16.3 \\ \hline \end{array}\] a. Calculate the narrow-sense heritability for both traits (calcium and growth hormone levels). b. Which trait, if any, will more likely respond to artificial selection?

a. To calculate the narrow-sense heritab

Exam 24: Quantitative Genetics

Garter snakes eat poisonous newts. Selection favors increased resistance to the poison. Garter snakes must also escape their own predators, and they do so by crawling away (fast snakes are more likely to escape than slow snakes are). After studying snakes for some time, you discover that (1) both resistance and speed are highly heritable and (2) selection on resistance and speed is strong. Nonetheless, you find that neither trait increases very much each generation. Explain this result.

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Question 1

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The lack of significant increase in both resistance to poison and speed in garter snakes despite strong selection and high heritability can be attributed to a few factors.

Firstly, it is possible that there is a trade-off between resistance to poison and speed. This means that as snakes evolve to become more resistant to the poison of newts, they may sacrifice some of their speed. This trade-off could limit the overall increase in both traits, as selection for one trait may come at the expense of the other.

Additionally, the genetic variation in the snake population may be limited. If there is not enough genetic diversity for resistance and speed, then there may be a ceiling effect, where the potential for further improvement in these traits is constrained by the available genetic variation.

Furthermore, environmental factors such as the availability of newts and the presence of predators could also play a role. If the environment does not consistently favor increased resistance or speed, then the selection pressure may not be strong enough to drive significant changes in these traits over time.

Overall, the lack of substantial increase in resistance to poison and speed in garter snakes despite strong selection and high heritability can be attributed to potential trade-offs between the traits, limited genetic variation, and fluctuating environmental pressures.

Use the following to answer questions The height of a type of bean plant is determined by five unlinked genes called A, B, C, D, and E. Each gene has two alleles: additive (uppercase letter) and nonadditive (lowercase letter). The shortest plants are 130 cm. The tallest plants are 220 cm. The genotypes are known for two bean plants. Plant 1 is genotype AABbccDdEE. Plant 2 is genotype aaBBCcDdEE. -If the progeny plant resulting from an AbcdE gamete from plant 1(AABbccDdEE) and an aBcdE gamete from plant 2 (aaBBCcDdEE) was only 60 cm because of an allele in a gene other than A-E, what genetic phenomenon is at work?

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Question 2

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Genetic variance is comprised of all of the following components EXCEPT: (Select all that apply.)

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Question 3

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C, E

You are hired as a consultant for a new venture: pet-squirrel breeding! Because customers prefer bushy tails on their pet squirrels, you are asked to help produce bushy-tailed squirrels from a local population as quickly and efficiently as possible. Of course, you know that bushy tails are a quantitative genetic trait in squirrels. a. What information would you need to obtain in order to accomplish this task? b. Given your success at this job, you are hired by a breeder in Canada to help set up a breeding program. You hate the cold weather and want to avoid any unnecessary trips to Canada. Can you take what you have learned about your local population of squirrels and apply it to the Canadian population? Why or why not?

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Question 4

Two different varieties of pumpkin have the same mean fresh weight of 22.5 lb. However, one variety (LV) has a very low variance, while the other (HV) has a much higher variance in fresh weight. a. What are some possible reasons for the differences in the variance between these two varieties? b. If you were a pumpkin breeder and wanted to develop a heavier variety of pumpkin, which of these two varieties would you select to start your breeding program? Explain why.

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Question 5

Astronomers are able to measure precisely the distance between Earth and Margalit's comet on its approach toward the Sun. During the same time period, the price of oil increases. You measure the correlation coefficient between the price of oil and the distance between Earth and the comet and discover that the correlation coefficient is equal to -1. How would you interpret this correlation?

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Question 6

Use the following to answer questions The height of a type of bean plant is determined by five unlinked genes called A, B, C, D, and E. Each gene has two alleles: additive (uppercase letter) and nonadditive (lowercase letter). The shortest plants are 130 cm. The tallest plants are 220 cm. The genotypes are known for two bean plants. Plant 1 is genotype AABbccDdEE. Plant 2 is genotype aaBBCcDdEE. -What will be the genotype and phenotype of a plant from an AbcdE gamete from plant 1(AABbccDdEE) and an aBcdE gamete from plant 2 (aaBBCcDdEE), and what is the probability of a plant with this genotype?

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Question 7

Knowing the _____ of a trait has great practical importance because it allows statistical predictions regarding the phenotypes of offspring to be made on the basis of the parents' phenotypes.

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Question 8

A population may eventually stop responding to artificial selection because:

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Question 9

Use the following to answer questions The height of a type of bean plant is determined by five unlinked genes called A, B, C, D, and E. Each gene has two alleles: additive (uppercase letter) and nonadditive (lowercase letter). The shortest plants are 130 cm. The tallest plants are 220 cm. The genotypes are known for two bean plants. Plant 1 is genotype AABbccDdEE. Plant 2 is genotype aaBBCcDdEE. -Estimate how many centimeters each allele contributes to the height difference of 90 cm.

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Question 10

If broad-sense heritability for a trait is very high and narrow-sense heritability is very low, which of the following statements must be TRUE?

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Question 11

Since the entire population is too large to work with, a sample is often used to characterize the population. This sample should:

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Question 12

Use the following to answer questions The height of a type of bean plant is determined by five unlinked genes called A, B, C, D, and E. Each gene has two alleles: additive (uppercase letter) and nonadditive (lowercase letter). The shortest plants are 130 cm. The tallest plants are 220 cm. The genotypes are known for two bean plants. Plant 1 is genotype AABbccDdEE. Plant 2 is genotype aaBBCcDdEE. -If the progeny plant from an AbcdE gamete from plant 1(AABbccDdEE) and an aBcdE gamete from plant 2 (aaBBCcDdEE) was a few centimeters taller than your prediction, how would you explain it?

(Multiple Choice)

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Question 13

Use the following to answer questions The height and weight for three dogs are shown below. Weight\nobreakspacein\nobreakspacekilograms Height\nobreakspacein\nobreakspacecentimeters 7 22 4 12 10 30 -What is the standard deviation of the height? Round to the nearest whole number.

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Question 14

Which of the following statement(s) about heritability is/are TRUE? (Select all that apply.)

(Multiple Choice)

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Question 15

In a group of 10 black bears, the length of the longest claw was measured in each bear. These lengths are listed below in cm. What is the mean of these lengths? 2.8, 3.1, 3.8, 3.2, 3.3, 2.9, 3.2, 3.1, 3.5, 3.0

(Multiple Choice)

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Question 16

Use the following to answer questions The height and weight for three dogs are shown below. Weight\nobreakspacein\nobreakspacekilograms Height\nobreakspacein\nobreakspacecentimeters 7 22 4 12 10 30 -What is the mean of the weight? Round to the nearest whole number.

(Multiple Choice)

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Question 17

A QTL:

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Question 18

A study was conducted to investigate the levels of calcium and growth hormone excreted in chicken dung on a major chicken farm. The variances (V) were calculated and are shown below. Variance Calcium Growth hormone 321.2 95.8 119.7 69.4 107.4 10.1 94.1 16.3 a. Calculate the narrow-sense heritability for both traits (calcium and growth hormone levels). b. Which trait, if any, will more likely respond to artificial selection?

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Question 19

Which model BEST explains inheritance of complex traits such as height, weight, and IQ?

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Question 20

Showing 1 - 20 of 81

Genetic variance is comprised of all of the following components EXCEPT: (Select all that apply.)

Knowing the _____ of a trait has great practical importance because it allows statistical predictions regarding the phenotypes of offspring to be made on the basis of the parents' phenotypes.

A population may eventually stop responding to artificial selection because:

If broad-sense heritability for a trait is very high and narrow-sense heritability is very low, which of the following statements must be TRUE?

Since the entire population is too large to work with, a sample is often used to characterize the population. This sample should:

Use the following to answer questions The height and weight for three dogs are shown below. Weight\nobreakspacein\nobreakspacekilograms Height\nobreakspacein\nobreakspacecentimeters 7 22 4 12 10 30 -What is the standard deviation of the height? Round to the nearest whole number.

Which of the following statement(s) about heritability is/are TRUE? (Select all that apply.)

In a group of 10 black bears, the length of the longest claw was measured in each bear. These lengths are listed below in cm. What is the mean of these lengths? 2.8, 3.1, 3.8, 3.2, 3.3, 2.9, 3.2, 3.1, 3.5, 3.0

Use the following to answer questions The height and weight for three dogs are shown below. Weight\nobreakspacein\nobreakspacekilograms Height\nobreakspacein\nobreakspacecentimeters 7 22 4 12 10 30 -What is the mean of the weight? Round to the nearest whole number.

A QTL:

Which model BEST explains inheritance of complex traits such as height, weight, and IQ?

Introduction to Genetics

Chromosomes and Cellular Reproduction

Basic Principles of Heredity

Sex Determination and Sex-Linked Characteristics

Extensions and Modifications of Basic Principles

Pedigree Analysis, Applications, and Genetic Testing

Linkage, Recombination, and Eukaryotic Gene Mapping

Chromosome Variation

Bacterial and Viral Genetic Systems

DNA: the Chemical Nature of the Gene

Chromosome Structure and Organelle Dna

DNA Replication and Recombination

Transcription

Rna Molecules and Rna Processing

The Genetic Code and Translation

Control of Gene Expression in Prokaryotes

Control of Gene Expression in Eukaryotes

Gene Mutations and Dna Repair

Molecular Genetic Analysis and Biotechnology

Genomics and Proteomics

Epigenetics

Developmental Genetics and Immunogenetics

Cancer Genetics

Population Genetics

Evolutionary Genetics

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