Domanda del libro di testo
________ are segments of DNA that code for a specific protein, and the human ________ includes over 20,000 of these segments.
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Ch. 27 Development and Heredity
Amerman2nd EditionHuman Anatomy & PhysiologyISBN: 9780136873822
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TOC.tableOfContents
- Ch. 1 Introduction to Anatomy and Physiology26
- Ch. 2 The Chemistry of Life38
- Ch. 3 The Cell55
- Ch. 4 Histology47
- Ch. 5 The Integumentary System30
- Ch. 6 Bones and Bone Tissue36
- Ch. 7 The Skeletal System40
- Ch. 8 Articulations19
- Ch. 9 The Muscular System36
- Ch. 10 Muscle Tissue and Physiology29
- Ch. 11 Introduction to the Nervous System and Nervous Tissue28
- Ch. 12 The Central Nervous System42
- Ch. 13 The Peripheral Nervous System41
- Ch. 14 The Autonomic Nervous System and Homeostasis31
- Ch. 15 The Special Senses39
- Ch. 16 The Endocrine System42
- Ch. 17 The Cardiovascular System I: The Heart30
- Ch. 18 The Cardiovascular System II: The Blood Vessels43
- Ch. 19 Blood32
- Ch. 20 The Lymphatic System and Immunity45
- Ch. 21 The Respiratory System27
- Ch. 22 The Digestive System27
- Ch. 23 Metabolism and Nutrition7
- Ch. 24 The Urinary System39
- Ch. 25 Fluid, Electrolyte, and Acid-Base Homeostasis39
- Ch. 26 The Reproductive System10
- Ch. 27 Development and Heredity5
Amerman2nd EditionHuman Anatomy & PhysiologyISBN: 9780136873822Non è quello che usi tu?Cambia libro di testo
Capitolo 27, Problema L3.3
Determine the probability of a couple having a child with a widow's peak if the conditions are as follows: The gene for widow's peak follows strict autosomal dominant-recessive inheritance. Widow's peak (W) is dominant, and no widow's peak (w) is recessive. The genotype of the mother is Ww, and the genotype of the father is ww.
Guida verificata passo dopo passo1
Step 1: Understand the inheritance pattern. Widow's peak is an autosomal dominant trait, meaning only one dominant allele (W) is needed for the trait to be expressed. The recessive allele (w) will only result in no widow's peak if both alleles are recessive (ww).
Step 2: Write down the genotypes of the parents. The mother has the genotype Ww (heterozygous), meaning she carries one dominant allele (W) and one recessive allele (w). The father has the genotype ww (homozygous recessive), meaning he carries two recessive alleles (w).
Step 3: Set up a Punnett square to determine the possible genotypes of the offspring. Place the mother's alleles (W and w) on one side of the square and the father's alleles (w and w) on the other side.
Step 4: Fill in the Punnett square by combining the alleles from the mother and father. This will give you the possible genotypes of the offspring: Ww (widow's peak) and ww (no widow's peak).
Step 5: Calculate the probability of each genotype. Count the number of squares with Ww (dominant phenotype) and ww (recessive phenotype) and divide by the total number of squares (4). This will give you the probability of the child having a widow's peak.
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Autosomal Dominant and Recessive Inheritance
Autosomal inheritance refers to the transmission of genes located on the autosomes, which are the non-sex chromosomes. In this context, a dominant allele (W) will express its trait even if only one copy is present, while a recessive allele (w) requires two copies to express the trait. Understanding this distinction is crucial for predicting the inheritance patterns of traits like widow's peak.
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Percorso guidato
01:02
Autosomal Inheritance
Genotype and Phenotype
The genotype is the genetic makeup of an individual, represented by the alleles they possess (e.g., Ww or ww). The phenotype is the observable expression of the genotype, such as having a widow's peak or not. In this scenario, knowing the genotypes of the parents allows us to predict the potential phenotypes of their offspring.
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06:36Genotype & Phenotype
Punnett Square
A Punnett square is a diagram used to predict the genetic outcomes of a cross between two individuals. It helps visualize the possible combinations of alleles from each parent, allowing for the calculation of probabilities for different genotypes and phenotypes in the offspring. This tool is essential for determining the likelihood of the couple having a child with a widow's peak.
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07:23X-Linked Inheritance
Pratica correlata
Domanda del libro di testo
Elise is a freshman college student taking Introduction to Biology. In lab, she is asked her parents' blood types to complete a Punnett square. She knows that she has type A blood and that her mother has type B, but she does not know her father's blood type. Elise's lab partner assures her that she can figure out her father's blood type just by knowing her own and her mother's. Is her lab partner correct? Explain why or why not.
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Domanda del libro di testo
Which pattern of inheritance includes examples of codominance?
a. Autosomal dominant and recessive traits
b. Multiple-allele traits
c. Sex-linked traits
d. Polygenic inheritance
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Domanda del libro di testo
Certain diseases are transmitted via mitochondrial DNA. Which cell types do you think would be most affected by such diseases, and why?
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