Question 1

Do the principles discovered by Mendel for discontinuous traits also apply to the inheritance of traits that exhibit continuous variation? Explain your answer.

Accepted Answer

Yes, the principles discovered by Mendel...

Question 2

Phenotypic variation in a trait is often represented as a _____, which graphs the number of each phenotypic class in a sample.

Accepted Answer

A)   bimodal distribution
B)   frequency distribution
C)   regression line
D)   correlation
E)   variance plotF) C) and E)
G) C) and D)

Question 3

A selective breeding program in corn is undertaken to increase oil content. The results are shown below.  a. Based on the results shown in the graph, during which part of the selective breeding program was narrow-sense heritability the highest-early, middle, or late? Explain your answer.
b. Provide an explanation why the breeding program became ineffective after generation 60.

Accepted Answer

The answer of A selective breeding program in corn is...

Question 4

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.
-All the genes are unlinked. Determine the probability of an AbcdE gamete from plant 1(AABbccDdEE)  and an aBcdE gamete from plant 2 (aaBBCcDdEE) .

Accepted Answer

A)   1/2 chance from plant 1; 1/2 chance from plant 2
B)   1/4 chance from plant 1; 1/4 chance from plant 2
C)   1/2 chance from plant 1; 1/4 chance from plant 2
D)   1/4 chance from plant 1; 1/2 chance from plant 2
E)   1/4 chance from plant 1; 3/4 chance from plant 2F) A) and B)
G) B) and E)

Question 5

Use the following to answer questions 
The height and weight for three dogs are shown below.
  Weight in kilogramsHeight in centimeters7224121030\begin{array}{cc}Weight~ in ~kilograms&Height~ in~ centimeters\7 & 22 \4 & 12 \10 & 30\end{array}Weight in kilograms7410​Height in centimeters221230​ 
-What is the variance of the weight? Round to the nearest whole number.

Accepted Answer

A)   7
B)   9
C)   21
D)   22
E)   81 F) A) and B)
G) A) and C)

Question 6

Use the following to answer questions 
The height and weight for three dogs are shown below.
  Weight in kilogramsHeight in centimeters7224121030\begin{array}{cc}Weight~ in ~kilograms&Height~ in~ centimeters\7 & 22 \4 & 12 \10 & 30\end{array}Weight in kilograms7410​Height in centimeters221230​ 
-What is the mean of the height? Round to the nearest whole number.

Accepted Answer

A)   7
B)   12
C)   21
D)   22
E)   80 F) B) and C)
G) None of the above

Question 7

In a population of pigs, the average body weight is 178 kg. Suppose you select the 15 largest pigs, whose average body weight is 205 kg, and interbreed them. The average body weight of the offspring of the selected pigs is 191 kg. If you were to select pigs that have an average weight of 240 kg, what would be the predicted weight of the progeny produced by the selected pigs?

Accepted Answer

A)   30
B)   62
C)   115
D)   208
E)   270F) B) and E)
G) A) and B)

Question 8

Heritability indicates the:

Accepted Answer

A)   degree to which a characteristic is genetically determined.
B)   proportion of phenotypic variation in a trait that is due to genetic differences.
C)   degree to which a characteristic is environmentally determined.
D)   proportion of phenotypic variation in a trait that is due to the environment.
E)   extent to which identical twins are phenotypically similar.F) A) and B)
G) A) and C)

Question 9

Use the following to answer questions 
The height and weight for three dogs are shown below.
  Weight in kilogramsHeight in centimeters7224121030\begin{array}{cc}Weight~ in ~kilograms&Height~ in~ centimeters\7 & 22 \4 & 12 \10 & 30\end{array}Weight in kilograms7410​Height in centimeters221230​ 
-What is the value of the covariance?

Accepted Answer

A)   0
B)   1
C)   3
D)   9
E)   27 F) C) and E)
G) B) and C)

Question 10

_____ measures the effect of alleles at a locus interacting in a nonadditive fashion.

Accepted Answer

A)   Additive genetic variance
B)   Dominance genetic variance
C)   Genetic variance
D)   Genetic-environmental interaction variance
E)   Phenotypic varianceF) C) and E)
G) A) and E)

Question 11

Is it possible for a trait to be discontinuous and yet determined by multiple genetic and environmental factors? Explain.

Accepted Answer

Yes, it is possible for a trait to be di...

Question 12

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. What information would you need to obtain in order to accomplish this task?

Accepted Answer

A)   the response to selection in the local squirrel population
B)   the narrow-sense heritability in the local squirrel population
C)   the selection differential in the local squirrel population
D)   the dominance variance in the local squirrel population
E)   the environmental variance in the local squirrel populationF) B) and D)
G) B) and E)

Question 13

Flower diameter in sunflowers is a quantitative trait. A plant with 6-cm flowers, from a highly inbred strain, is crossed to a plant with 30-cm flowers, also from a highly inbred strain. The F1 have 18-cm flowers. F1 × F1 crosses yield F2 plants with flowers ranging from 6 to 30 cm in diameter, in approximately 4-cm intervals (6, 10, 14, 18, 22, 26, 30) . An 18-cm F1 plant is crossed to a 6-cm plant. What is the probability of an offspring with one additive allele, if all genes that influence this trait are unlinked?

Accepted Answer

A)   1/3
B)   1/4
C)   1/6
D)   3/8
E)   1/16F) B) and C)
G) A) and C)

Question 14

In a population of geese, the narrow-sense heritability for wing span is 0.5. The phenotypic variance is 0.8 and the environmental inheritance is 0.2. What is the additive genetic variance?

Accepted Answer

A)   0.25
B)   0.4
C)   0.5
D)   0.75
E)   1.5F) B) and D)
G) B) and C)

Question 15

Flower diameter in sunflowers is a quantitative trait. A plant with 6-cm flowers, from a highly inbred strain, is crossed to a plant with 30-cm flowers, also from a highly inbred strain. The F1 have 18-cm flowers. F1 × F1 crosses yield F2 plants with flowers ranging from 6 to 30 cm in diameter, in approximately 4-cm intervals (6, 10, 14, 18, 22, 26, 30) . The number of different genes influencing flower diameter in this plant is:

Accepted Answer

A)   three.
B)   four.
C)   five.
D)   six.
E)   seven.F) B) and E)
G) B) and D)

Question 16

Recently, genome-wide association studies that locate genes influencing quantitative traits have been facilitated by the use of:

Accepted Answer

A)   pedigrees.
B)   controlled crosses.
C)   clonal lineages.
D)   RFLPs.
E)   SNPs.F) C) and E)
G) B) and E)

Question 17

Total phenotypic variance CANNOT be broken down into which component?

Accepted Answer

A)   genetic-environmental interaction variance
B)   genetic variance
C)   environmental variance
D)   heritability
E)   genic interaction varianceF) None of the above
G) C) and D)

Question 18

_____ is measured in terms of the original units squared.

Accepted Answer

A)   Mean
B)   Standard deviation
C)   Variance
D)   Correlation coefficient
E)   Narrow-sense heritabilityF) B) and D)
G) D) and E)

Question 19

When _____ is high for a particular trait, offspring tend to resemble their parents for that trait.

Accepted Answer

A)   phenotypic variance
B)   the number of genes controlling a trait
C)   narrow-sense heritability
D)   genetic-environmental interaction
E)   environmental varianceF) D) and E)
G) A) and B)

Question 20

In a natural population of outbreeding plants, the variance of the total number of seeds per plant is 16. From the natural population, 20 plants are taken into the laboratory and developed into separate true-breeding lines by self-fertilization-with selection for high, low, or moderate number of seeds-for 10 generations. The average variance in the tenth generation in each of the 20 sets is about equal and averages 5.8 across all the sets. Estimate the broad-sense heritability for seed number in this population.

Accepted Answer

To estimate the broad-sense heritability...

Exam 24: Quantitative Genetics

Is it possible for a trait to be discontinuous and yet determined by multiple genetic and environmental factors? Explain.

Correct Answer
Answered by ExamLex AI
Yes, it is possible for a trait to be di...
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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 value of the covariance?

Correct Answer
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_____ measures the effect of alleles at a locus interacting in a nonadditive fashion.

Correct Answer
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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 variance of the weight? Round to the nearest whole number.

Correct Answer
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Do the principles discovered by Mendel for discontinuous traits also apply to the inheritance of traits that exhibit continuous variation? Explain your answer.

Correct Answer
Answered by ExamLex AI
Yes, the principles discovered by Mendel...
View Answer

Correct Answer
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Recently, genome-wide association studies that locate genes influencing quantitative traits have been facilitated by the use of:

Correct Answer
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Phenotypic variation in a trait is often represented as a _____, which graphs the number of each phenotypic class in a sample.

Correct Answer
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Total phenotypic variance CANNOT be broken down into which component?

Correct Answer
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_____ is measured in terms of the original units squared.

Correct Answer
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Correct Answer
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When _____ is high for a particular trait, offspring tend to resemble their parents for that trait.

Correct Answer
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Heritability indicates the:

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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 height? Round to the nearest whole number.

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
Answered by ExamLex AI
To estimate the broad-sense heritability...
View Answer

In a population of geese, the narrow-sense heritability for wing span is 0.5. The phenotypic variance is 0.8 and the environmental inheritance is 0.2. What is the additive genetic variance?

Correct Answer
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Exam 24: Quantitative Genetics

Is it possible for a trait to be discontinuous and yet determined by multiple genetic and environmental factors? Explain.

Correct AnswerAnswered by ExamLex AIYes, it is possible for a trait to be di...View AnswerShow Answer

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Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

_____ measures the effect of alleles at a locus interacting in a nonadditive fashion.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Do the principles discovered by Mendel for discontinuous traits also apply to the inheritance of traits that exhibit continuous variation? Explain your answer.

Correct AnswerAnswered by ExamLex AIYes, the principles discovered by Mendel...View AnswerShow Answer

Correct AnswerverifiedShow Answer

Recently, genome-wide association studies that locate genes influencing quantitative traits have been facilitated by the use of:

Correct AnswerverifiedShow Answer

Phenotypic variation in a trait is often represented as a _____, which graphs the number of each phenotypic class in a sample.

Correct AnswerverifiedShow Answer

Total phenotypic variance CANNOT be broken down into which component?

Correct AnswerverifiedShow Answer

_____ is measured in terms of the original units squared.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

When _____ is high for a particular trait, offspring tend to resemble their parents for that trait.

Correct AnswerverifiedShow Answer

Heritability indicates the:

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Correct AnswerverifiedShow Answer

Correct AnswerAnswered by ExamLex AITo estimate the broad-sense heritability...View AnswerShow Answer

In a population of geese, the narrow-sense heritability for wing span is 0.5. The phenotypic variance is 0.8 and the environmental inheritance is 0.2. What is the additive genetic variance?

Correct AnswerverifiedShow Answer

Correct Answer
Answered by ExamLex AI
Yes, it is possible for a trait to be di...
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
Answered by ExamLex AI
Yes, the principles discovered by Mendel...
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
Answered by ExamLex AI
To estimate the broad-sense heritability...
View Answer

Correct Answer
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