Human Heredity: Principles and Issues (MindTap Course List)
11th Edition
ISBN: 9781305251052
Author: Michael Cummings
Publisher: Cengage Learning
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Chapter 5, Problem 15QP
Dizygotic twins:
- a. are as closely related as monozygotic twins
- b. are as closely related as non-twin siblings
- c. share 100% of their genetic material
- d. share 25% of their genetic material
- e. none of these
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Students have asked these similar questions
A trait exhibits 100% concordance for both monozygotic and dizygotic twins. What conclusion can you draw about the role of genetic factors in determining differences in the trait?
a. Genetic factors are extremely important.b. Genetic factors are somewhat important.c. Genetic factors are unimportant.d. Both genetic and environmental factors are important.
Which of the following is the definition of the term named Homozygous?
a.Refers to genes that have identical alleles
b.Genetic constitution of an organism
c.Alternative form of a gene
d.Trait expressed in the F1 generation
e.Fundamental physical and functional unit of heredity
f.Physical expression of traits of an organism
a. Why males and females do not show equal chances of inheriting a trait?
b. Is it possible to determine the genotypes of the parents based on the phenotypes of the offspring?
Chapter 5 Solutions
Human Heredity: Principles and Issues (MindTap Course List)
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Ch. 5 - Describe why there is a fundamental difference...Ch. 5 - Sunflowers with flowers 10 cm in diameter are...Ch. 5 - Clubfoot is a common congenital birth defect. This...Ch. 5 - Define genetic variance.Ch. 5 - Define environmental variance.Ch. 5 - How is heritability related to genetic and...Ch. 5 - Why are relatives used in the calculation of...Ch. 5 - If there is no genetic variation within a...Ch. 5 - Can conjoined (Siamese) twins be dizygotic twins...Ch. 5 - Dizygotic twins: a. are as closely related as...Ch. 5 - Why are monozygotic twins who are reared apart so...Ch. 5 - Monozygotic (MZ) twins have a concordance value of...Ch. 5 - If monozygotic twins show complete concordance for...Ch. 5 - Researchers set up an obesity study in which MZ...Ch. 5 - What does the ob gene code for? How does it work?...Ch. 5 - What is the importance of the comparison of traits...Ch. 5 - Height in humans is controlled by the additive...Ch. 5 - If diseases such as cardiovascular disease...Ch. 5 - Prob. 24QPCh. 5 - Prob. 25QPCh. 5 - Suppose that a team of researchers analyzes the...
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- In 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_forwardConsider the following human traits: Eye color: brown (B) is dominant over blue (b)Fingers: polydactylous (P) or extra fingers is dominant over normal (p) fingersHairline: widows peak (W) is dominant of normal (w) hairline A man with the genotype BBPpWW marries a woman with the genotype bbPpWw.What is the probability that they will have a: a. Baby boy? b. Child with blue eyes? c. Child with normal fingers? d. Child with widow’s peak?e. Baby girl with blue eyes? f. Baby boy with normal fingers?g. brown-eyed, polydactylous child?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_forward
- Which of the following is NOT true of Y-linked traits? Select one: a. They are always expressed. b. They are extremely uncommon in females. c. They are passed from father to son. d. They carry both dominant and recessive alleles of a trait.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_forwardBaldness is a Sex Influenced Trait. A heterozygous bald man and a heterozygous nonbald woman plan to have two kids. What are the phenotypes for their kids? a.If both sons; they will all be bald. b.If both daughters; both will be bald. c.If both daughters; they will all be normal- nonbald. d.If male or female ; Either a bald or normal daughter and either a bald or normal sonarrow_forward
- Which of the following statements correctly describes a Y-linked trait? A. It will always be expressed if present in female individuals B. It can be inherited by a daughter for her father C. It can be inherited by a son from his mother D. It will always be expressed if present in male individualsarrow_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_forwardColor-blindness (c) is a sex-linked recessive trait, while normal color vision (C) is dominant: If two normal-visioned parents have a color-blind son, what are the parent's genotypes? ~What are the chances that their children will be color-blind?arrow_forward
- 1.a) Ama’s mother uses the Authoritarian parental style. His dad who is laid back would rather use the Neglectful style which allows Ama to do what she wants. Yet Ama’s grandmother who feels children should be allowed to voice their ideas uses the Authoritative style when Ama visits her during holidays. During an interview as a potential mother, Ama would capture these as what data type? b) Give THREE reasons for your choice of answer. a.Discreteb.Continuousc.Nominald.Ordinale.Combination of Discrete and nominalarrow_forward3) Suppose that an allele, b, of a sex-linked gene, is recessive and lethal. A man marries a woman who is heterozygous for this gene. If this couple had 10 children, what would be the predicted sex ratio of these children (ratio of male children to female children)? (5 a) 1:1 b) 1.5:1 c) 2:1 d) 2.5:1arrow_forwardWhich of the following is true of recessive sex-linked genes? A. A female showing the trait will pass it on to all of her sons who will all show the trait. B. A female showing the trait will pass it on to all of her daughters who will all show the trait. C. A male showing the trait will pass it on to all of his sons who will all show the trait. D. A male showing the trait will pass it on to all of his daughters who will all show the trait.arrow_forward
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