- Chromosome that determines the sex of an animal. In humans, where the two sex chromosomes (X and Y) are dissimilar, the female has two X chromosomes, and the male is heterogametic (XY). In birds, the opposite is the case, the male being XX and the female XY; in many organisms, there is only one sex chromosome, and one sex is XX, the other X0. A portion of the X and Y chromosomes is similar and is known as the pseudoautosomal region.
Dictionary of molecular biology. 2004.
Look at other dictionaries:
sex chromosome — n a chromosome (as the X chromosome or the Y chromosome in humans) of a sexually reproducing eukaryotic organism that is directly concerned with the inheritance of sex, that contains the genes governing the inheritance of various sex linked and… … Medical dictionary
sex chromosome — n. a sex determining chromosome in the germ cells of most animals and a few plants: in most animals, including human beings, all the eggs carry an X chromosome and the spermatozoa either an X or Y chromosome, and an egg receiving an X chromosome… … English World dictionary
sex chromosome — ► NOUN ▪ a chromosome concerned in determining the sex of an organism (in mammals the X and Y chromosomes) … English terms dictionary
sex chromosome — sex chromosome. См. половая хромосома. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) … Молекулярная биология и генетика. Толковый словарь.
sex chromosome — Genetics. a chromosome, differing in shape or function from other chromosomes, that determines the sex of an individual. [1910 15] * * * Either of a pair of chromosomes that determine whether an individual is male or female. The sex chromosomes… … Universalium
sex chromosome — noun (genetics) a chromosome that determines the sex of an individual mammals normally have two sex chromosomes • Topics: ↑genetics, ↑genetic science • Hypernyms: ↑chromosome • Hyponyms … Useful english dictionary
sex chromosome — UK / US noun [countable] Word forms sex chromosome : singular sex chromosome plural sex chromosomes biology a chromosome that controls what the sex of a living thing will be, for example the x chromosomes and y chromosomes in humans and animals … English dictionary
sex chromosome — Differentiated chromosome which is responsible for the determination of sex of the individual. For all mammals, a small number of flowering plants and many insects, female individuals carry a pair of X chromosomes, and males carry one X and one Y … Glossary of Biotechnology
sex chromosome — sex′ chro mosome n. gen a chromosome that determines the sex of an individual … From formal English to slang
sex chromosome — chromosome that determines the sex of a creature … English contemporary dictionary