Textbook Question
Name the primary placental hormones and their functions.
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Ch. 29 Development and Inheritance
Martini, Nath, Bartholomew12th EditionFundamentals of Anatomy and PhysiologyISBN: 9780137854011
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Table of contents
- Ch. 1 An Introduction to Anatomy and Physiology25
- Ch. 2 The Chemical Level of Organization34
- Ch. 3 The Cellular Level of Organization29
- Ch. 4 The Tissue Level of Organization24
- Ch. 5 The Integumentary System17
- Ch. 6 Bones and Bone Structure33
- 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 Senses15
- Ch. 18 The Endocrine System21
- Ch. 19 Blood31
- Ch. 20 The Heart31
- Ch. 21 Blood Vessels and Circulation26
- Ch. 22 The Lymphatic System and Immunity25
- Ch. 23 The Respiratory System4
- Ch. 24 The Digestive System18
- Ch. 26 The Urinary System31
- Ch. 27 Fluids & Electrolytes30
- Ch. 28 The Reproductive System12
- Ch. 29 Development and Inheritance17
Martini, Nath, Bartholomew12th EditionFundamentals of Anatomy and PhysiologyISBN: 9780137854011Not the one you use?Change textbook
Chapter 28, Problem 24a
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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Understand the concept of inheritance patterns in genetics, which describe how traits are passed from parents to offspring.
Analyze the statement: 'Children who exhibit the trait have at least one parent who also exhibits it.' This suggests that the trait does not skip generations.
Recall that in dominant inheritance, an affected individual usually has at least one affected parent because only one copy of the dominant allele is needed to express the trait.
Contrast this with recessive inheritance, where children can exhibit the trait even if neither parent shows it, due to carriers.
Conclude that the described pattern corresponds to a dominant mode of inheritance, where the trait appears in every generation and affected children have affected parents.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Types of Inheritance Patterns
Inheritance patterns describe how traits are passed from parents to offspring. Common types include dominant, recessive, autosomal, and sex-linked inheritance. Understanding these patterns helps determine how a trait is transmitted through generations.
Recommended video:
01:02
Autosomal Inheritance
Dominant Inheritance
In dominant inheritance, only one copy of a dominant allele is needed for the trait to be expressed. Affected individuals usually have at least one affected parent, as the trait does not skip generations.
Recommended video:
03:09Incomplete Dominance
Recessive Inheritance
Recessive inheritance requires two copies of a recessive allele for the trait to be expressed. Traits can skip generations, and affected children may have parents who do not show the trait but are carriers.
Recommended video:
07:23X-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
After implantation, how does the developing embryo obtain nutrients? What structures and processes are involved?
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Textbook Question
Distinguish between the following paired terms:
(b) heterozygous and homozygous,
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