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The X chromosome is one of the two sex chromosomes in many organisms, including mammals, and is found in both males and females. It is a part of the XY sex-determination system and XO sex-determination system. The X chromosome was named for its unique properties by early researchers, which resulted in the naming of its counterpart Y chromosome ...
The XY sex-determination systemis a sex-determination systempresent in many mammals, including humans, some insects (Drosophila), some snakes, some fish (guppies), and some plants (Ginkgotree). In this system, the sexof an individual usually is determined by a pair of sex chromosomes. Typically, females have two of the same kind of sex ...
The X chromosome is part of chromosome group C, and the Y chromosome is part of group G. Bands and sub-bands are annotated to the right of each chromosome (or chromosome pair), and the gene for the sex-determining region Y protein is located at Yp11.2.
X-inactivation(also called Lyonization, after English geneticist Mary Lyon) is a process by which one of the copies of the X chromosomeis inactivated in therianfemale mammals. The inactive X chromosome is silenced by being packaged into a transcriptionally inactive structure called heterochromatin.
The cells of those born male contain an X chromosome and a Y chromosome that make a pair and give instructions on which genes should be expressed in the body, the researchers said.
The human Y chromosome showing the SRY gene which codes for a protein regulating sexual differentiation. Sexual differentiation in humans is the process of development of sex differences in humans. It is defined as the development of phenotypic structures consequent to the action of hormones produced following gonadal determination. [1]
Henry Turner. Turner syndrome (TS), also known as 45,X, or 45,X0, is a genetic disorder in which a females cells have only one X chromosome or are partially missing an X chromosome (sex chromosome monosomy) leading to the complete or partial deletion of the pseudoautosomal regions (PAR1, PAR2) in the affected X chromosome. [ 2 ][ 6 ][ 7 ] Most ...
De la Chapelle syndrome [ 1 ] Human karyotype 46 XX. Specialty. Medical genetics. XX male syndrome, also known as de la Chapelle syndrome, is a rare condition in which an individual with a 46,XX karyotype develops a male phenotype. [ 2 ] Synonyms for XX male syndrome include 46,XX testicular difference of sex development (or 46,XX DSD) [ 3 ][ 4 ...