Textbook Question
Indicate the type of inheritance involved in each of the following situations.
(a) Children who exhibit the trait have at least one parent who also exhibits it.
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Ch. 29 Development and Inheritance
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089
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Table of contents
- Ch. 1 An Introduction to Anatomy and Physiology26
- Ch. 2 The Chemical Level of Organization34
- Ch. 3 The Cellular Level of Organization30
- Ch. 4 The Tissue Level of Organization24
- Ch. 5 The Integumentary System17
- Ch. 6 Bones and Bone Structure36
- Ch. 7 The Axial Skeleton11
- Ch. 8 The Appendicular Skeleton17
- Ch. 9 Joints13
- Ch. 10 Muscle Tissue12
- Ch. 11 The Muscular System28
- Ch. 12 Nervous Tissue18
- Ch. 13 The Spinal Cord, Spinal Nerves, and Spinal Reflexes22
- Ch. 14 The Brain and Cranial Nerves20
- Ch. 15 Sensory Pathways and the Somatic Nervous System17
- Ch. 16 The Autonomic Nervous System and Higher-Order Functions30
- Ch. 17 The Special Senses16
- Ch. 18 The Endocrine System20
- Ch. 19 Blood31
- Ch. 20 The Heart31
- Ch. 21 Blood Vessels and Circulation29
- Ch. 22 The Lymphatic System and Immunity31
- Ch. 23 The Respiratory System12
- Ch. 24 The Digestive System18
- Ch. 26 The Urinary System31
- Ch. 27 Fluids & Electrolytes32
- Ch. 28 The Reproductive System12
- Ch. 29 Development and Inheritance23
Martini, Nath, Bartholomew11th EditionFundamentals of Anatomy & PhysiologyISBN: 9780136874089Not the one you use?Change textbook
Chapter 28, Problem 24d
Indicate the type of inheritance involved in each of the following situations.
(d) The trait is expressed equally in daughters and sons.
Verified step by step guidance1
Understand the concept of inheritance: Inheritance refers to the transmission of genetic traits from parents to offspring. Traits can be inherited through different patterns, such as autosomal dominant, autosomal recessive, X-linked, or mitochondrial inheritance.
Analyze the statement: The problem states that the trait is expressed equally in daughters and sons. This suggests that the inheritance pattern is not sex-linked, as sex-linked traits typically show differences in expression between males and females.
Consider autosomal inheritance: Traits expressed equally in both sexes are often inherited through autosomal chromosomes, which are non-sex chromosomes. Autosomal inheritance can be dominant or recessive.
Differentiate between autosomal dominant and autosomal recessive inheritance: In autosomal dominant inheritance, only one copy of the dominant allele is needed for the trait to be expressed. In autosomal recessive inheritance, two copies of the recessive allele are required for the trait to be expressed.
Conclude the type of inheritance: Based on the information provided, the trait is likely inherited through an autosomal pattern, as it is expressed equally in daughters and sons. Further details about the dominance or recessiveness of the trait would be needed to specify the exact type of autosomal inheritance.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Autosomal Inheritance
Autosomal inheritance refers to the transmission of traits determined by genes located on the autosomes, which are the non-sex chromosomes. In this type of inheritance, traits can be expressed equally in both males and females, as both genders have two copies of each autosome. This is crucial for understanding why a trait might appear similarly in daughters and sons.
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01:02
Autosomal Inheritance
Dominant and Recessive Traits
In genetics, traits can be classified as dominant or recessive based on their expression. A dominant trait will manifest in the phenotype even if only one copy of the gene is present, while a recessive trait requires two copies for expression. If a trait is expressed equally in both genders, it may indicate that it is a dominant trait, as it does not depend on the sex of the individual.
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03:39Dominant vs. Recessive Alleles
Sex-Linked Inheritance
Sex-linked inheritance involves genes located on the sex chromosomes (X and Y). Traits that are sex-linked often show different patterns of expression in males and females due to the presence of one X and one Y chromosome in males, and two X chromosomes in females. If a trait is expressed equally in both daughters and sons, it suggests that the trait is not sex-linked but rather follows autosomal inheritance patterns.
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04:17Sex-Linked Inheritance
Related Practice
Textbook Question
Hemophilia A, a condition in which blood does not clot properly, is a recessive trait located on the X chromosome (Xʰ). Suppose that a woman who is heterozygous for this trait (XXʰ) has children with a normal male (XY). What is the probability that the couple will have daughters with hemophilia? What is the probability that the couple will have sons with hemophilia?
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Textbook Question
Indicate the type of inheritance involved in each of the following situations.
(b) Children exhibit the trait even though neither parent does.
1
views
Textbook Question
Indicate the type of inheritance involved in each of the following situations.
(c) The trait is expressed more commonly in sons than in daughters.
1
views