Domanda del libro di testo
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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TOC.tableOfContents
- 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: 9780136874089Non è quello che usi tu?Cambia libro di testo
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Martini, Nath, Bartholomew 11th EditionCh. 29 Development and InheritanceProblema 24c
Martini, Nath, Bartholomew 11th EditionCh. 29 Development and InheritanceProblema 24cCapitolo 28, Problema 24c
Indicate the type of inheritance involved in each of the following situations.
(c) The trait is expressed more commonly in sons than in daughters.
Guida verificata passo dopo passo1
Understand the concept of inheritance patterns: Traits can be inherited through autosomal or sex-linked inheritance. Sex-linked inheritance involves genes located on sex chromosomes (X or Y).
Recognize that traits expressed more commonly in sons than in daughters often suggest X-linked inheritance. This is because males have only one X chromosome, so a recessive allele on the X chromosome will be expressed in males.
Recall that females have two X chromosomes, so they would need two copies of the recessive allele for the trait to be expressed. This makes the trait less common in daughters.
Consider examples of X-linked traits, such as hemophilia or color blindness, which are more frequently observed in males due to the inheritance pattern.
Conclude that the type of inheritance involved in this situation is likely X-linked recessive inheritance, based on the description of the trait being more common in sons than daughters.
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Sex-Linked Inheritance
Sex-linked inheritance refers to traits that are associated with genes located on sex chromosomes, particularly the X and Y chromosomes. In many cases, traits linked to the X chromosome are expressed differently in males and females due to the presence of only one X chromosome in males (XY) compared to two in females (XX). This can lead to certain traits being more commonly expressed in males, especially if the trait is recessive.
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Percorso guidato
04:17
Sex-Linked Inheritance
Autosomal vs. Sex-Linked Traits
Autosomal traits are those determined by genes located on non-sex chromosomes (autosomes), while sex-linked traits are influenced by genes on sex chromosomes. Understanding the distinction is crucial for determining inheritance patterns. If a trait is expressed more in sons than daughters, it often indicates a sex-linked inheritance pattern, particularly if the trait is recessive and located on the X chromosome.
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04:17Sex-Linked Inheritance
Recessive and Dominant Alleles
Alleles can be classified as dominant or recessive based on their expression in the phenotype. A dominant allele will mask the effect of a recessive allele in a heterozygous individual. In the context of sex-linked traits, if a recessive allele is present on the X chromosome, it may be expressed in males who have only one X chromosome, leading to a higher prevalence of the trait in sons compared to daughters.
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03:39Dominant vs. Recessive Alleles
Pratica correlata
Domanda del libro di testo
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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Domanda del libro di testo
Indicate the type of inheritance involved in each of the following situations.
(b) Children exhibit the trait even though neither parent does.
45
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Domanda del libro di testo
Distinguish between the following paired terms:
(c) simple inheritance and polygenic inheritance.
73
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Domanda del libro di testo
Indicate the type of inheritance involved in each of the following situations.
(d) The trait is expressed equally in daughters and sons.
76
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