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HomeHomework HelpgeneticsSex-linked Inheritance

Sex-linked Inheritance

Sex-linked inheritance, specifically X-linked traits, refers to the transmission of genetic characteristics that are associated with genes located on the X chromosome, where males (XY) are more likely to express recessive traits due to having only one X chromosome, while females (XX) may be carriers or express the traits depending on the alleles present.

intermediate
2 hours
Genetics
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Overview

Sex-linked inheritance is a fascinating aspect of genetics that explains how certain traits are passed down through generations via the sex chromosomes. The X chromosome carries many genes that can influence various traits, and because males have only one X chromosome, they are often more affected b...

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Key Terms

X-linked trait
A trait associated with a gene located on the X chromosome.

Example: Color blindness is an X-linked trait.

Y-linked trait
A trait associated with a gene located on the Y chromosome.

Example: Male pattern baldness is a Y-linked trait.

Carrier
An individual who has one copy of a recessive allele for a trait but does not express it.

Example: A female carrier of hemophilia.

Hemizygosity
Having only one allele for a gene instead of the usual two, typical in males for X-linked genes.

Example: Males are hemizygous for X-linked traits.

Genetic counseling
A process to help individuals understand genetic conditions and their implications.

Example: Genetic counseling for families with a history of hemophilia.

Mendelian inheritance
Patterns of inheritance that follow Mendel's laws, including dominant and recessive traits.

Example: Pea plant traits studied by Mendel.

Related Topics

Mendelian Genetics
Study of inheritance patterns based on Mendel's laws.
intermediate
Genetic Disorders
Understanding various genetic disorders and their inheritance patterns.
intermediate
Population Genetics
Study of genetic variation within populations and how it changes over time.
advanced

Key Concepts

X-linked traitsY-linked traitsCarrier statusHemizygosity