sex chromosomes


Also found in: Thesaurus, Medical, Legal, Encyclopedia, Wikipedia.
Related to sex chromosomes: DNA, Down syndrome, Multiple alleles

sex chromosomes


click for a larger image
The X and Y chromosomes, genetically determining gender: normally XX produces females and XY produces males.
References in periodicals archive ?
In birds, males have two Z sex chromosomes, and females have one Z and one W sex chromosome.
Our sex chromosomes are set at conception and do not change throughout our lives.
Instead of having two sex chromosomes, an X and Y in a male, or two X's in a female, Jeanne's baby-to-be and Mark had three, known as a "trisomy".
When sex chromosomes among' common pill bugs go bad from disuse, borrowed bacterial DNA comes to the rescue.
Objective: Sex chromosomes have evolved independently countless times throughout the eukaryotes.
These thread-like structures consist of 22 general pairs, plus a pair of sex chromosomes which can be X or Y.
Our purpose was to evaluate the taxonomic and phylogenetic distribution of multiple sex chromosomes in the Cyprinodontina.
Such a size difference between sex chromosomes and autosomes is unusual in Lepidoptera, and was described in detail only in some species of the family Tortricidae (Sichova et al.
This number also excludes recessive mutations carried on the sex chromosomes.
She points out that the genomic approach of studying the sex chromosomes is too limited and riddled with gender politics.
He explained that the condition may happen when an organism's sex chromosomes did not separate during cell division in its early development, which causes some of the cells to have a female genotype and the others to have a male genotype.