Domanda del libro di testo
Write a short essay that correlates Mendel's four postulates with what is now known about genes, alleles, and homologous chromosomes.
621
views
Ch. 3 - Mendelian Genetics
Klug12th EditionConcepts of GeneticsISBN: 9780135564776
Non è quello che usi tu?Cambia libro di testoScegli un libro di testo diverso
TOC.tableOfContents
- Ch. 1 - Introduction to Genetics17
- Ch. 2 - Mitosis and Meiosis36
- Ch. 3 - Mendelian Genetics51
- Ch. 4 - Extensions of Mendelian Genetics74
- Ch. 5 - Chromosome Mapping in Eukaryotes51
- Ch. 6 - Genetic Analysis and Mapping in Bacteria and Bacteriophages46
- Ch. 7 - Sex Determination and Sex Chromosomes33
- Ch. 8 - Chromosome Mutations: Variation in Number and Arrangement40
- Ch. 9 - Extranuclear Inheritance31
- Ch. 10 - DNA Structure and Analysis43
- Ch. 11 - DNA Replication and Recombination44
- Ch. 12 - DNA Organization in Chromosomes30
- Ch. 13 - The Genetic Code and Transcription54
- Ch. 14 - Translation and Proteins47
- Ch. 15 - Gene Mutation, DNA Repair, and Transposition41
- Ch. 16 - Regulation of Gene Expression in Bacteria29
- Ch. 17 - Transcriptional Regulation in Eukaryotes41
- Ch. 18 - Post-transcriptional Regulation in Eukaryotes33
- Ch. 19 - Epigenetics33
- Ch. 20 - Recombinant DNA Technology44
- Ch. 21 - Genomic Analysis36
- Ch. 22 - Applications of Genetic Engineering and Biotechnology36
- Ch. 23 - Developmental Genetics37
- Ch. 24 - Cancer Genetics34
- Ch. 25 - Quantitative Genetics and Multifactorial Traits54
- Ch. 26 - Population and Evolutionary Genetics45
Klug12th EditionConcepts of GeneticsISBN: 9780135564776Non è quello che usi tu?Cambia libro di testo
Capitolo 3, Problema 3b
Albinism in humans is inherited as a simple recessive trait. For the following families, determine the genotypes of the parents and offspring. (When two alternative genotypes are possible, list both.)
A normal male and an albino female have six children, all normal.
Guida verificata passo dopo passo1
Identify the inheritance pattern: Albinism is a recessive trait, so the genotype for albinism is homozygous recessive (aa), and normal pigmentation can be either homozygous dominant (AA) or heterozygous (Aa).
Determine the genotype of the albino female parent: Since she shows the recessive phenotype, her genotype must be aa.
Analyze the normal male parent's genotype: Because all six children are normal but the mother is aa, the father must carry at least one dominant allele (A). Since some children could be carriers, the father could be either AA or Aa.
Predict the genotypes of the offspring: Each child receives one allele from each parent. Since the mother is aa, all children receive an a allele from her. The father's contribution determines the child's genotype: if the father is AA, all children will be Aa (normal carriers); if the father is Aa, children could be either Aa (normal carriers) or aa (albino), but since all children are normal, the father is more likely AA or the Aa children did not inherit the recessive allele from the father.
Summarize possible genotypes: Parents - Male: AA or Aa, Female: aa; Offspring - all normal, so genotypes are either all Aa (if father is AA) or a mix of Aa and possibly aa (if father is Aa), but since no albino children are observed, the father is most likely AA.
Risposta video verificata per un problema simile:
Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
1mConcetti chiave
Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.
Recessive Inheritance
Recessive inheritance means a trait is expressed only when an individual has two copies of the recessive allele. In albinism, the condition appears only if the genotype is homozygous recessive (aa). Carriers with one dominant and one recessive allele (Aa) show a normal phenotype but can pass the recessive allele to offspring.
Video consigliato:
Percorso guidato
05:13
Organelle Inheritance
Genotype and Phenotype Relationship
Genotype refers to the genetic makeup (allele combination) of an organism, while phenotype is the observable trait. For albinism, individuals with AA or Aa genotypes have normal pigmentation, whereas aa individuals are albino. Understanding this helps predict offspring traits based on parental genotypes.
Video consigliato:
Percorso guidato
07:52Gamete Genotypes
Punnett Square and Probability in Genetics
A Punnett square is a tool used to predict the possible genotypes of offspring from parental alleles. It helps calculate the probability of inheriting specific traits, such as albinism, by combining parental alleles. This method is essential for determining possible genotypes when given phenotypes.
Video consigliato:
Percorso guidato
07:41Probability
Pratica correlata
Domanda del libro di testo
Albinism in humans is inherited as a simple recessive trait. For the following families, determine the genotypes of the parents and offspring. (When two alternative genotypes are possible, list both.)
A normal male and an albino female have six children, three normal and three albino.
1293
views
Domanda del libro di testo
Which of Mendel's postulates are illustrated by the pedigree that you constructed in Problem 3? List and define these postulates.
834
views
Domanda del libro di testo
Albinism in humans is inherited as a simple recessive trait. For the following families, determine the genotypes of the parents and offspring. (When two alternative genotypes are possible, list both.)
Two normal parents have five children, four normal and one albino.
1702
views
Domanda del libro di testo
Since experimental crosses are not performed in humans, how do we know how traits are inherited?
498
views
Domanda del libro di testo
Albinism in humans is inherited as a simple recessive trait. For the following families, determine the genotypes of the parents and offspring. (When two alternative genotypes are possible, list both.)
Construct a pedigree of the families in (b) and (c). Assume that one of the normal children in (b) and one of the albino children in (c) become the parents of eight children. Add these children to the pedigree, predicting their phenotypes (normal or albino).
1204
views