EBK BIOLOGY
5th Edition
ISBN: 8220100667978
Author: Maier
Publisher: PEARSON
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Chapter 7, Problem 10LTB
Summary Introduction
Introduction:
The quantitative traits are the measurable
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There are 100 students in a class. Ninety-six did well in the course whereas four blew it totally and received a grade of F. Sorry. In the highly unlikely event that these traits are genetic rather than environmental, if these traits involve dominant and recessive alleles, and if the four (4%) represent the frequency of the homozygous recessive condition, calculate the frequency of homozygous individuals.
a. 20%
b. 32%
c. 64%
d. 80%
e. 96%
f. 98%
g. 0.64%
h. none of the choices
There are 100 students in a class. Ninety-six did well in the course whereas four blew it totally and received a grade of F. Sorry. In the highly unlikely event that these traits are genetic rather than environmental, if these traits involve dominant and recessive alleles, and if the four (4%) represent the frequency of the homozygous recessive condition, calculate the frequency of individuals having the dominant trait.
a. 20%
b. 32%
c. 64%
d. 80%
e. 96%
f. 98%
g. 0.64%
h. none of the choices
There are 100…
A gene for a particular trait that is expressed when two copies (homozygous) or just one copy of the same allele are present (heterozygous), is called a(n):
A. Dominant trait.
B. Codominant trait.
C. Incompletely dominant trait.
D. Recessive trait.
E. Multiple allele.
In a population of squirrels in North Carolina, the heritability forbody weight is high. This means thata. body weight is primarily controlled by genes.b. the environment has little influence on body weight.c. the variance in body weight is mostly due to genetic variation.d. both a and b are correct.
Chapter 7 Solutions
EBK BIOLOGY
Ch. 7 - What is the relationship between genotype and...Ch. 7 - Prob. 2LTBCh. 7 - Prob. 3LTBCh. 7 - Prob. 4LTBCh. 7 - Prob. 5LTBCh. 7 - Scientists have recently developed a process by...Ch. 7 - What is the physical basis for the independent...Ch. 7 - Prob. 8LTBCh. 7 - Prob. 9LTBCh. 7 - Prob. 10LTB
Ch. 7 - Prob. 1GPCh. 7 - Prob. 2GPCh. 7 - Prob. 3GPCh. 7 - Prob. 4GPCh. 7 - Pfeiffer syndrome is a dominant genetic disease...Ch. 7 - Prob. 6GPCh. 7 - A cross between a pea plant that produces round...Ch. 7 - Prob. 8GPCh. 7 - The allele BRCA2 was identified in families with...Ch. 7 - Two parents both have brown eyes, but they have...Ch. 7 - Prob. 2AAATBCh. 7 - Prob. 3AAATBCh. 7 - Prob. 1CTSCh. 7 - Prob. 2CTSCh. 7 - Prob. 3CTS
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- When comparing asthma and cystic fibrosis, the proportion of variance in each illness that can be explained by genetic factors: a. Is different for different populations b. is highest in cystic fibrosis c. is the same for both illnesses Od. Is highest in asthmaarrow_forwardAll 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.arrow_forwardConsider a gene with two alleles, G and g, and heterozygote superiority. Which statement about the fitness of each genotype is correct? A. The fitnesses of the three genotypes would be the same B. The fitness of gg would be greater than that of wither Gg or GG C. There is not enough information to tell D. The fitness of GG would be greater than that of either Gg or gg E. The fitness of Gg would be greater than that of wither gg or GGarrow_forward
- Are the following statements regarding heritability true or false?A. Heritability applies to a specific population raised in aparticular environment.B. Heritability in the narrow sense takes into account all types ofgenetic variance. C. Heritability is a measure of the amount that genetics contributesto the outcome of a trait.arrow_forwardGive at least 3 species characteristics of human beings. What are "phenocopies"? Give at least three (3) specific examples. Examples 1. 2. 3. 3. Which do you think is the most important type of variation? Why? 4. Differentiate continuous from discontinuous trait. Give at least two (2) examples each. Continuous trait Discontinuous traitarrow_forwardWhich of the following is false? a. The color of a fruit fly's eyes is a trait. b. The instructions for producing a trait are found in a gene that controls the physical expression of that trait. c. A gene can have different alleles that can specify different traits, such as red or brown eye color. d. The trait is influenced by the gene, independent of the environment. e. By studying the patterns of traits over generations of an organism, the genetic composition of an organism can be deduced.arrow_forward
- a. Father of Genetics; studied pea plants; made the 3 laws of genetics - 1. Heredity inheritance, dominance, and segregation 2. Traits b. A trait that's STRONGER and covers over another; CAPITOL letter 3. Dominant c. The weaker trait, that we can't see when we have the stronger allele; 4. Recessive lower case letter 5. incomplete d. A characteristic or feature of a person, something about how they look. dominance e. The offspring of 2 different plants or animals 6. Hybrid f. Passing characteristics (traits) on from generation to generation 7. Gregor Mendel (grandma →mom → you) g. When the dominate allele isn't strong enough to be completely dominantarrow_forwardFor many quantitative traits, genotypes and phenotypes tend tooverlap becausea. the trait changes over time.b. the trait is polygenic.c. environmental variation affects the trait.d. both b and c are true.arrow_forwardThe difference between dominant and recessive traits is … Group of answer choices: A.genes for dominant traits are passed on preferentially. B.effects of recessive traits can be hidden by effects of dominant traits. C.recessive traits are deleterious (bad for the organism) and dominant traits are not. D.dominant genes produce proteins, recessive genes do not. E.dominant traits are more likely to be expressed in males.arrow_forward
- When calculating heritability in finch beak size using parent/offspring data, we find that 70 percent of the variation in the trait is due to genetics. What might explain the remainder of the variation? Select all that apply. A. nutrition B. color C. precipitation D. stress E. rarity F. temperaturearrow_forwardIf a dominant trait shows a penetrance of 50%, then ___. A. All affected individuals in the population are heterozygotes. B. Individuals who have the gene show an intermediate trait. C. Half the individuals in the population have the gene. D. Half the individuals in the population who have the gene show the trait.arrow_forwardWhich of the following statements best describe the equation P = G + E + (G X E)?* a. The phenotype is the sum of the genotype and the environment. b. The phenotype of an organism is determined by its genetic traits. c. The phenotype is the total characteristics displayed by an organism that results from the expression of the genes as well as the influence of environmental factors. d. The phenotype is the observable and measurable characteristics of an organism as a result of the interaction of the genes of the organism, environmental factors, and random variation.arrow_forward
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