Wiktionary
alt. (context genetics English) A mammalian sex chromosome, occurring only in male cells. Cells of females have a pair of X chromosomes while cells of males have an X and a Y. n. (context genetics English) A mammalian sex chromosome, occurring only in male cells. Cells of females have a pair of X chromosomes while cells of males have an X and a Y.
Wikipedia
The Y chromosome is one of two sex chromosomes ( allosomes) in mammals, including humans, and many other animals. The other is the X chromosome. Y is the sex-determining chromosome in many species, since it is the presence or absence of Y that determines the male or female sex of offspring produced in sexual reproduction. In mammals, the Y chromosome contains the gene SRY, which triggers testis development. The DNA in the human Y chromosome is composed of about 59 million base pairs. The Y chromosome is passed only from father to son. With a 30% difference between humans and chimpanzees, the Y chromosome is one of the fastest-evolving parts of the human genome. To date, over 200 Y-linked genes have been identified. All Y-linked genes are expressed and (apart from duplicated genes) hemizygous (present on only one chromosome) except in the cases of aneuploidy such as XYY syndrome or XXYY syndrome. (See Y linkage.)
Usage examples of "y chromosome".
In males the Y chromosome would suppress the X-linked diseases, but in females the trinucleotide syndromes would be expressed.
His current quest was to find a transponase to handle a minor histocompatibility gene on the Y chromosome.
I prefer merely to acknowledge that a Y chromosome switches gonad development from the ovarian path to the testicular path, and to draw no metaphysical conclusions.
Since the male germ-cellif I remember rightlyhas only twenty-three identical pairs of chromosomes and an additional unmatched pair called the X-Y chromosome, it divides into two male gametes of twenty-four chromosomes each, of which only twenty-three have a twin in each gamete.
A male, having both an X and a Y chromosome, will show two bands, one the same size as the female and one slightly larger.
Ponter was male, and so had both an X and a Y chromosome, and, just as in a male of Mary’.
Deety, I still have that Y chromosome in every cell even though it has been so inhibited by hormone balance that I don't notice it.
The Y chromosome of the female was made radiant by the radiation, which is why we are so big and radiant.
The second virus would plant compensating sequences on the Y chromosome.
In fact, my clone-brother, who's really me in male guise, a Y chromosome in place of an X—.
In fact, my clone-brother, who's really me in male guise, a Y chromosome in place of an X&mdash.