The differences in behavior of sex-linked gene and autosomal gene in genetic crosses. Introduction: Sex-linked genes are basically different from autosomes thereby, their inheritance pattern also differs. The genes are present on sex chromosomes, which determine the sex of progeny. Few genes, for example, the eye color in Drosophila is linked to X chromosome and therefore, shows the sex-linked inheritance.

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Features of a Concept Features of a Concept Characteristics are discrete; that is, they are unitary. Genetic features have alternative forms, and each feature is inherited from one of the two parents. These are called alleles. One allele is dominant over the other allele. The dominant allele is reflected in the phenotype. Random segregation creates the gametes. The heterozygotic individuals produce gametes with an equal frequency of both alleles. Genes are unlinked; that is, different traits arise from the independent assortment.

Chapter 12.4, Problem 4R

Summary Introduction

To review:

The differences in behavior of sex-linked gene and autosomal gene in genetic crosses.

Introduction:

Sex-linked genes are basically different from autosomes thereby, their inheritance pattern also differs. The genes are present on sex chromosomes, which determine the sex of progeny. Few genes, for example, the eye color in Drosophila is linked to X chromosome and therefore, shows the sex-linked inheritance.

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*Example 2: Tracing the path of an autosomal dominant trait Trait: Neurofibromatosis Forms of the trait: The dominant form is neurofibromatosis, caused by the production of an abnormal form of the protein neurofibromin. Affected individuals show spots of abnormal skin pigmentation and non-cancerous tumors that can interfere with the nervous system and cause blindness. Some tumors can convert to a cancerous form. i The recessive form is a normal protein - in other words, no neurofibromatosis.moovi A typical pedigree for a family that carries neurofibromatosis is shown below. Note that carriers are not indicated with half-colored shapes in this chart. Use the letter "N" to indicate the dominant neurofibromatosis allele, and the letter "n" for the normal allele. Nn nn nn 2 nn Nn A 3 N-

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Answer 2

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Features of a Concept Features of a Concept Characteristics are discrete; that is, they are unitary. Genetic features have alternative forms, and each feature is inherited from one of the two parents. These are called alleles. One allele is dominant over the other allele. The dominant allele is reflected in the phenotype. Random segregation creates the gametes. The heterozygotic individuals produce gametes with an equal frequency of both alleles. Genes are unlinked; that is, different traits arise from the independent assortment.

Chapter 12.4, Problem 4R

Summary Introduction

To review:

The differences in behavior of sex-linked gene and autosomal gene in genetic crosses.

Introduction:

Sex-linked genes are basically different from autosomes thereby, their inheritance pattern also differs. The genes are present on sex chromosomes, which determine the sex of progeny. Few genes, for example, the eye color in Drosophila is linked to X chromosome and therefore, shows the sex-linked inheritance.

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Answer 3

Question

Features of a Concept Features of a Concept Characteristics are discrete; that is, they are unitary. Genetic features have alternative forms, and each feature is inherited from one of the two parents. These are called alleles. One allele is dominant over the other allele. The dominant allele is reflected in the phenotype. Random segregation creates the gametes. The heterozygotic individuals produce gametes with an equal frequency of both alleles. Genes are unlinked; that is, different traits arise from the independent assortment.

Chapter 12.4, Problem 4R

Summary Introduction

To review:

The differences in behavior of sex-linked gene and autosomal gene in genetic crosses.

Introduction:

Sex-linked genes are basically different from autosomes thereby, their inheritance pattern also differs. The genes are present on sex chromosomes, which determine the sex of progeny. Few genes, for example, the eye color in Drosophila is linked to X chromosome and therefore, shows the sex-linked inheritance.

Expert Solution & Answer

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Check out a sample textbook solution

See solution

Answer 4

Question

Features of a Concept Features of a Concept Characteristics are discrete; that is, they are unitary. Genetic features have alternative forms, and each feature is inherited from one of the two parents. These are called alleles. One allele is dominant over the other allele. The dominant allele is reflected in the phenotype. Random segregation creates the gametes. The heterozygotic individuals produce gametes with an equal frequency of both alleles. Genes are unlinked; that is, different traits arise from the independent assortment.

Chapter 12.4, Problem 4R

Summary Introduction