SEX LINKAGE Meaning and
Definition
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Sex linkage refers to the inheritance pattern of certain genes that are located on the sex chromosomes, namely the X and Y chromosomes in humans. Specifically, it describes the transmission of genes or traits from parent to offspring in a manner that is closely associated with the individual's sex. In most cases, sex linkage involves characteristics controlled by genes located on the X chromosome, as the Y chromosome does not carry many genes unrelated to male reproductive functions.
Typically, sex-linked traits are inherited in a manner that is more frequently expressed in one sex over the other. This is due to the fact that males have only one X chromosome and one Y chromosome, whereas females possess two X chromosomes. As a result, if a male inherits a sex-linked recessive allele from his mother, it will often be displayed phenotypically since there is no corresponding allele on the Y chromosome to mask its expression. Conversely, females would require both X chromosomes to carry the recessive allele in order for it to manifest.
Some well-known examples of sex-linked traits include color blindness, hemophilia, and muscular dystrophy. In these conditions, the affected genes are located on the X chromosome, increasing the likelihood of males expressing the traits as they have only one X chromosome. However, females can still be carriers of the disorder if they inherit the recessive allele from their carrier mother. Thus, sex linkage provides a basis for understanding the inheritance patterns of certain traits and disorders that disproportionately affect one sex over the other.
Common Misspellings for SEX LINKAGE
Etymology of SEX LINKAGE
The term "sex linkage" is derived from the combination of two words: "sex" and "linkage".
- "Sex" refers to the biological distinction between male and female organisms, primarily based on their reproductive organs and secondary sexual characteristics. It comes from the Latin word "sexus", which means "state of being either male or female".
- "Linkage" refers to the connection or association between two or more things. It is derived from the Old English word "hlencan" which means "to link or unite".
When combined, "sex linkage" refers to the association or connection between a gene or trait and the sex chromosomes (X and Y chromosomes) in certain organisms. This term is commonly used in genetics to describe the inheritance pattern of certain traits that are located on the sex chromosomes.
Similar spelling words for SEX LINKAGE
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