EBK HUMAN BIOLOGY
11th Edition
ISBN: 8220100545931
Author: MCMILLAN
Publisher: Cengage Learning US
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Chapter 19, Problem 9SQ
Summary Introduction
Introduction: The morphological or biochemical or physiological expression of the trait of the gene that encodes the trait is called the
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The 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.
Which 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.
Which 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.
Chapter 19 Solutions
EBK HUMAN BIOLOGY
Ch. 19 - Define the difference between (a) gene and allele,...Ch. 19 - Prob. 2RQCh. 19 - What is probability, and how is it applied in...Ch. 19 - What is independent assortment? Does independent...Ch. 19 - Alleles are ___________. a. alternate forms of a...Ch. 19 - A heterozygote has _____. a. only one of the...Ch. 19 - Prob. 3SQCh. 19 - Offspring of a cross AA aa are ______. a. all AA...Ch. 19 - Prob. 5SQCh. 19 - Prob. 6SQ
Ch. 19 - Which statement best fits the principle of...Ch. 19 - Prob. 8SQCh. 19 - Prob. 9SQCh. 19 - Prob. 10SQCh. 19 - One gene has alleles A and a. Another has alleles...Ch. 19 - Still referring to Problem 1, what will be the...Ch. 19 - Go back to Problem 1, and assume you now study a...Ch. 19 - The young woman shown at right has albinismvery...Ch. 19 - When you decide to breed your Labrador retriever...Ch. 19 - The ABO blood system has been used to settle cases...Ch. 19 - Prob. 7CTCh. 19 - A man is homozygous dominant for ten different...Ch. 19 - Prob. 9CTCh. 19 - Bill and Marie each have flat feet, long...Ch. 19 - You decide to breed a pair of guinea pigs, one...
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- .A) To determine if a human trait is heritable, we would best study Group of answer choices. I think it's A. Please explain your answer I'm trying to understand the material a. monozygotic twins that were raised separately, in different environments. b. monozygotic twins that have been raised under similar conditions. c.only distantly related individuals. d. all males or all females. B). To say that a trait exhibits “high heritability” is to say that a. a given set of genes has no influence on a trait. b. there is no difference in genotype between members of the population at the loci in question. c. in a given environment and population, genetic differences have a high degree of influence on the trait compared to environmental influences. d. there is no difference in character between two individuals with the same genotype in question. C). If two populations with identical genetic makeup are raised in different environments, the narrow-sense heritability of a trait of…arrow_forwardIn the context of genetic influence on individual differences, the degree of genetic influence typically a. increases from infancy through childhood, and then decreases from childhood through adulthood. b. decreases from infancy through adulthood. c. remains stable from infancy through adulthood. d. increases from infancy through adulthood.arrow_forwardA 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.arrow_forward
- . Which of the following terms applies to traits, such as human eye color, that are controlled by more than one gene? A. Codominant B. Polygenic C. Recessive D. Sex-linkedarrow_forwardColor blindness is typically an inherited genetic condition in which individuals have a decreased ability to see color or differences in color. Color blindness only occurs in individuals who have two recessive alleles for the condition. Normal color vision is due to a dominant allele (C) Color blindness is due to the recessive allele (c) a) If Susan is homozygous for normal vision, and Matt is homozygous for color blindness, what is the likelihood (in percentage) that their son Alex will have color blindness? Perform a Punnett Square (either below or by hand on paper) to find the probability. Provide your answer in a full sentence. If you did the Punnett Square by hand, attach your photo to the next question.arrow_forwardSome heterozygotes express a phenotype that is intermediate between the dominant and recessive phenotype. For example, in 4 o’clock flowers the gene for red pigmentation is dominant and the gene for white pigmentation is recessive. However, heterozygotes are pink. The dominant allele does not completely mask expression of the recessive allele: it is incompletely dominant. a. By observing flower color in 4 o’clock flowers, is it possible to unambiguously determine the genotype? YES/NO. Explain your answer. b. Is the same true for flower color in snow peas? YES/NO Why or why not?arrow_forward
- In humans, a dimple in the chin is a dominant characteristic controlled by a single gene.a. A man who does not have a chin dimple haschildren with a woman with a chin dimple whose mother lacked the dimple. What proportion of theirchildren would be expected to have a chin dimple?b. A man with a chin dimple and a woman who lacksthe dimple produce a child who lacks a dimple.What is the man’s genotype?c. A man with a chin dimple and a nondimpledwoman produce eight children, all having the chindimple. Can you be certain of the man’s genotype?Why or why not? What genotype is more likely,and why?arrow_forwardThe role of the TPMT genotype in response to treatment emphasizes the importance of pharmacogenomics. What changes in treatment would be recommended for someone homozygous recessive for TPMT, compared to someone that is homozygous dominant?arrow_forward5)Recessive allele is a)the least common allele b)any variant of a gene c)the most common allele d)an allele that must have two copies present in the genotype to control a trait e)an allele that only needs a single copy present to control a traitarrow_forward
- Which of the following statements describes the multifactual inheritance in genetics? A. One locus is associated with different traits. B. One locus is associated with variable phenotypes of a trait. C. Several loci are associated with the trait.arrow_forwardJean-Baptiste Lamarck introduced a theory about inheritance in the early 1800s. Which of the following accurately describes his Theory of Acquired Characteristics? a. Offspring traits are the result of the blending of traits from the parents. b. Offspring traits are the result of parent individuals modifying their traits due to use or non-use. c. Traits are acquired from genes, and arise only from the mother not from the father. d. Traits are acquired from grandparents and skip the parent generation altogetherarrow_forwardWhich of the following is an example of how genotype and environmental factors can work together to determine phenotype? O a) Temperature-senitive mutations O b) Nutritional factors resulting in epigenetic modification of genes c) Sex-influenced inheritance O d) Both A and B O e) Both A and Carrow_forward
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