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 3c
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.
Guida verificata passo dopo passo1
Step 1: Understand the inheritance pattern. Albinism is a recessive trait, meaning an individual must inherit two recessive alleles (aa) to express the condition. A normal phenotype can result from either a homozygous dominant (AA) or heterozygous (Aa) genotype.
Step 2: Analyze the parents' phenotypes. The male is normal, so his genotype could be either AA or Aa. The female is albino, so her genotype must be aa (homozygous recessive).
Step 3: Examine the offspring's phenotypes. The offspring include three normal and three albino children. For albino offspring to occur, both parents must contribute a recessive allele (a). This means the male parent must be heterozygous (Aa), as a homozygous dominant (AA) male could not produce albino offspring.
Step 4: Determine the possible genotypes of the offspring. A cross between a heterozygous male (Aa) and a homozygous recessive female (aa) results in a Punnett square with the following probabilities: 50% heterozygous normal (Aa) and 50% homozygous recessive albino (aa).
Step 5: Conclude the genotypes. The male parent is heterozygous (Aa), the female parent is homozygous recessive (aa), and the offspring are either heterozygous normal (Aa) or homozygous recessive albino (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 Traits
Recessive traits are characteristics that only manifest when an individual has two copies of the recessive allele. In the case of albinism, the trait is expressed only when an individual inherits two recessive alleles (aa). If an individual has at least one dominant allele (A), the dominant trait will be expressed, masking the recessive trait.
Video consigliato:
Percorso guidato
13:40
Traits and Variance
Genotype vs. Phenotype
Genotype refers to the genetic makeup of an individual, specifically the alleles they carry, while phenotype is the observable expression of those genes. For example, an individual with the genotype 'Aa' (heterozygous) will have a normal phenotype, whereas 'aa' (homozygous recessive) will exhibit albinism. Understanding this distinction is crucial for predicting offspring traits.
Video consigliato:
Percorso guidato
07:52Gamete Genotypes
Punnett Squares
Punnett squares are a tool used in genetics to predict the probability of offspring genotypes based on the parental genotypes. By organizing the possible alleles from each parent, a Punnett square can help visualize the potential combinations and determine the likelihood of traits being expressed in the offspring, such as normal pigmentation or albinism in this scenario.
Video consigliato:
Percorso guidato
18:27Chi Square Analysis
Pratica correlata
Domanda del libro di testo
Discuss how Mendel's monohybrid results served as the basis for all but one of his postulates. Which postulate was not based on these results? Why?
575
views
1
rank
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, all normal.
1277
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
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