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Sex-linked

Biology Sex chromosomesSexual

sex-linked traits
those traits whose genes are located on the sex chromosome
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...

 


Sex-Linked Inheritance Problem Set 2
A. H. Sturtevant, a student of T. H. Morgan, published a paper in 1913 entitled "The Linear Arrangement of Six Sex-Linked Factors in Drosophila, as Shown by Their Mode of Association" (J. Exptl.

sex-linked genes
Genes located on one sex chromosome but not the other.
sex-linked trait ...

Sex-linked A trait which is caused by mutation of a gene on the X chromosome, usually called X linkage to avoid confusion with Y linked traits.
Sib A brother or sister.
Sibship All the brothers and sisters in one family.

Sex-linked Traits or diseases associated with the X or Y chromosome; generally seen in males.
See also: gene, mutation, sex chromosome ...

Sex-linked mutations such as Cinnamon, Ino, Opaline, Platinum (ika 'Pallid') and/or SL-Yellowfaced have a higher ratio of female to male offsprings due to the mode of inheritance.[3][4][5]
[edit] References ...

Only sex-linked or X-linked recessive traits "skip generations." That is because genes on the X chromosome are expressed in the male but usually not in the female since she has another X which will usually have the normal allele.

Hemophilia -- a sex-linked disease in humans in which the blood-clotting process is defective. Heterogeneity -- the production of identical or similar phenotypes by different genetic mechanisms. HGP -- Human Genome Project.

Again this is one of two sex-linked chromosomes that is involved in the determination of gender. As you know, in humans, basically if you are male you carry the X and Y chromosomes.

Genes inherited in this fashion are described as sex-linked or, more precisely, X-linked.
X-Linkage: An Example
Hemophilia A is a blood clotting disorder caused by a mutant gene encoding the clotting factor VIII.

Remember that sex-linked genes are on the X chromosome, one of the sex chromosomes. Linkage groups are invariably the same number as the pairs of homologous chromosomes an organism possesses.

hemophilia A human sex-linked recessive genetic disorder that results in the absence of certain blood-clotting factors, usually Factor VII. Hemophiliacs suffer from an inability to clot their blood.

From this, he concluded that (1) some traits were sex-linked, (2) the trait was probably carried on the sex chromosome (ie the X and Y chromosomes), and (3) other genes were probably carried on specific chromosomes as well.

See also: Sex, Inheritance, Chromosome, Human, Trait