sex chromosome


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sex chromosome

n.
Either of a pair of chromosomes in diploid cells, or a single chromosome in haploid cells, carrying genes that determine the sex and sex-linked characteristics of an organism. Most mammals, including humans, have one pair of sex chromosomes in diploid cells, designated XX in females and XY in males.

sex chromosome

n
(Genetics) either of the chromosomes determining the sex of animals. See also X-chromosome, Y-chromosome

sex′ chro`mosome


n.
a chromosome that determines the sex of an individual.

sex chromosome

Either of a pair of chromosomes, usually called X and Y, that in combination determine the sex of an individual in many animals and in some plants, with XX resulting in a female and XY in a male. Sex chromosomes carry the genes that control the development of reproductive organs and secondary sex characteristics.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.sex chromosome - (genetics) a chromosome that determines the sex of an individual; "mammals normally have two sex chromosomes"
chromosome - a threadlike strand of DNA in the cell nucleus that carries the genes in a linear order; "humans have 22 chromosome pairs plus two sex chromosomes"
X chromosome - the sex chromosome that is present in both sexes: singly in males and doubly in females; "human females normally have two X chromosomes"
XX - (genetics) normal complement of sex chromosomes in a female
XXX - (genetics) abnormal complement of three X chromosomes in a female
XXY - (genetics) abnormal complement of sex hormones in a male resulting in Klinefelter's syndrome
XY - (genetics) normal complement of sex hormones in a male
XYY - (genetics) abnormal complement of sex hormones in a male who has two Y chromosomes
Y chromosome - the sex chromosome that is carried by men; "human males normally have one X chromosome and one Y chromosome"
genetic science, genetics - the branch of biology that studies heredity and variation in organisms
References in periodicals archive ?
I used conventional methods of polytene chromosome analysis (Shields and Procunier, 1982; Shields, 2013) to determine the sex chromosome constitution of larvae of the S.
Dioecism accompanied by sex chromosome dimorphism is common in animals but less prevalent in plants.
We employed CGH to visualize the DNA difference on chr 1, the poorly differentiated sex chromosome in Nile tilapia.
The members of the research team shot the movie while aiming to examine the unusual sex chromosome development in the largest bug in Europe -Lethocerus patruelis .During the research, specimen were discovered in many areas of Southern Bulgaria - the district of Burgas-based oil refinery Lukoil, , in the region of Elhovo, in the rivers Maritza, Struma and Tundzha, and in the Kresna Gorge, among others.Lethocerus patruelis is the biggest European water bug that can grow as long as 8-12 sm.The bugs are known for injecting a digestive mixture of chemicals into their pray that they eat afterwards.
of California-Davis discuss the onset and developmental course, signs and symptoms, epidemiology and etiology, biological mechanisms, animal models, diagnosis and differential diagnosis, evidence-based interventions, supports and resources, outcomes, and ongoing research related to autism spectrum disorders; attention-deficit/hyperactivity disorder; fragile X syndrome; chromosome 22q11.2 deletion syndrome; Tourette syndrome, tic disorders, and comorbidities; Down syndrome, Angelman and Prader-Willi syndrome; Williams syndrome; sex chromosome aneuploidy; learning disorders; and speech and language disorders.
"This first demonstration of an X chromosome gene as a disease susceptibility factor in human lupus raises the possibility that the gender difference in rates may in part be attributed to sex chromosome genes," Dr.
Researchers in Australia found that a variant gene on the Y sex chromosome increases the risk of CAD by 50 percent (The Lancet, online Feb.
Triple X syndrome 47XXX is a sex chromosome abnormality characterized by presence of an extra X chromosome.
Of all cases with common autosomal or sex chromosome aneuploidy identified by karyotyping, 100% were confirmed by microarray testing, said Dr.
In most cases where there is cytogenetic involvement, it usually involves the rearrangement or loss of a sex chromosome (X or Y).
In the second meiotic division only one daughter cell received a sex chromosome in telophase II.
In another study in Germany on 781 infertile couples, the rate of chromosomal aberrations was only 1.9% for the male subjects including sex chromosome abnormalities (0.6%) (8).