Dictionary > Y linkage

Y linkage

Definition
noun, plural: Y linkages
(genetics) A form of sex linkage involving particularly the Y chromosome
Supplement
Sex linkage is the phenotypic expression of a gene occurring in the sex chromosome. The manifestation of certain traits is due to the expression of the genes located in the sex chromosome.
In humans and other mammals, the sex chromosomes are the X chromosome and the Y chromosome. Females would have two X chromosomes and males have one X chromosome and one Y chromosome. As such, sex linkage may be classified as X linkage or Y linkage. X linkage is a sex linkage involving the X chromosome whereas Y linkage is a sex linkage involving the Y chromosome. Since there are more genes in the X chromosome than in the Y chromosomes there are more X-linked traits than Y-linked.
Y linkage is the state of a genetic factor (gene) being borne on the Y chromosome. Since the Y chromosome does not fully take part in chiasma formation and recombination, it is not amenable to analysis by conventional linkage methods. Thus, little is known about its content. There is a gene for the h-Y antigen, and indirect arguments suggest that there is a principle that determines the formation of the testis and masculinization of the fetus but its localization, though narrowing the limits, remains elusive.
Compare:

  • X linkage

See also:

  • Y-linked inheritance
  • Y-linked gene


  • You will also like...

    Population Growth and Survivorship
    Population Growth and Survivorship

    This lesson looks at population attributes, regulation, and growth. It also covers population genetics, particularly gen..

    Selective Breeding
    Selective Breeding

    Gregor Mendel's studies into Monohybrid and Dihybrid crossing and Charles Darwin's study of evolution and natural select..

    Water Cycle
    The Water Cycle

    The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..

    New Zealand Flora & Fauna
    Ecology & Biodiversity: New Zealand Flora & Fauna

    New Zealand is known for its unique biodiversity, caused by its remarkable geography and geologic history. Breaking away..

    Angle Oak Tree
    Seed Plants

    Seed plants are vascular plants. They differ from the other vascular plants in producing seeds that germinate into a new..

    kinesin motor proteins transporting molecules across microtubules
    Movement of Molecules Across Cell Membranes

    Molecules move within the cell or from one cell to another through different strategies. Transport may be in the form of..