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The Y chromosome is one of two sex chromosomes in therian mammals and other organisms.Along with the X chromosome, it is part of the XY sex-determination system, in which the Y is the sex-determining chromosome because the presence of the Y chromosome causes offspring produced in sexual reproduction to be of male sex.
In this process, an X chromosome and a Y chromosome act to determine the sex of offspring, often due to genes located on the Y chromosome that code for maleness. Offspring have two sex chromosomes: an offspring with two X chromosomes (XX) will develop female characteristics, and an offspring with an X and a Y chromosome (XY) will develop male ...
The Y chromosome was a particularly hard nut to crack because it is unusually repetitive. The four letters or building blocks of DNA — adenine (A), cytosine (C), guanine (G) and thymine (T ...
Among the six species, the Y chromosome exhibited much more variability than the X chromosome. For example, the X chromosomes of humans and chimpanzees are about 98 percent identical in makeup.
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 ]
However, the aforementioned Y-chromosomes are only distantly related to instances of F*-M89 observed in samples of other populations of Thailand, including 5.6% (1/18) of a sample of Phuan from Central Thailand, 11.8% (2/17) of a sample of Soa from Northeast Thailand, and 29% (2/7) of a sample of Saek from Northeast Thailand.
“The Y chromosome contains the blueprints for certain genes,” according to the release. “Based on the way these genes are expressed in normal cells in the bladder lining, investigators ...
Scientists have taken an important step forward in understanding the human genome - our genetic blueprint - by fully deciphering the enigmatic Y chromosome present in males, an achievement that ...