The X chromosome is one of the two sex chromosomes in humans (the other is the Y chromosome). The sex chromosomes form one of the 23 pairs of human chromosomes in each cell. The X chromosome spans about 155 million DNA building blocks (base pairs) and represents approximately 5 percent of the total DNA in cells.
Each person normally has one pair of sex chromosomes in each cell. Females have two X chromosomes, while males have one X and one Y chromosome. Early in embryonic development in females, one of the two X chromosomes is randomly and permanently inactivated in cells other than egg cells. This phenomenon is called X-inactivation or Lyonization. X-inactivation ensures that females, like males, have one functional copy of the X chromosome in each body cell. Because X-inactivation is random, in normal females the X chromosome inherited from the mother is active in some cells, and the X chromosome inherited from the father is active in other cells.
Some genes on the X chromosome escape X-inactivation. Many of these genes are located at the ends of each arm of the X chromosome in areas known as the pseudoautosomal regions. Although many genes are unique to the X chromosome, genes in the pseudoautosomal regions are present on both sex chromosomes. As a result, men and women each have two functional copies of these genes. Many genes in the pseudoautosomal regions are essential for normal development.
Identifying genes on each chromosome is an active area of genetic research. Because researchers use different approaches to predict the number of genes on each chromosome, the estimated number of genes varies. The X chromosome likely contains between 900 and 1,400 genes. These genes perform a variety of different roles in the body.
(Note: So I believe your answer will be 46; 23x2)
In humans, the somatic cells of an offspring have 46 chromosomes.
An elephant sex cell (sperm or egg) contains 56 chromosomes. This is half the number of chromosomes found in a normal elephant cell, which typically has 112 chromosomes.
there is 4 pairs of chromosomes in each cell for a fly!
Short Answer is: twice the number of Chromosomes as found in the gametic [Haploid] Cells.
there are 46 chromosomes in a human skin cell.
There are 50 chromosomes in a pineapple cell.
46 chromosomes will be found in a human daughter cell after mitosis, 23 chromosomes will be found after meiosis.
A starfish as an average of 36 chromosomes.
how many chromosomes are found in the body of a horse
23
23
A sex cell contains half the number of chromosomes found in a somatic (normal) cell. Therefore a human sex cell would contain 23 chromosomes.
In humans, the somatic cells of an offspring have 46 chromosomes.
A sperm cell will have 23 chromosomes, half the number found in a somatic cell. So, if there are 13 pairs of homologous chromosomes in the parental cell, there would be 26 chromosomes in the parental cell, but the sperm cell would have 23 individual chromosomes.
A sex cell contains half the number of chromosomes found in a somatic (normal) cell. Therefore a human sex cell would contain 23 chromosomes.
An elephant sex cell (sperm or egg) contains 56 chromosomes. This is half the number of chromosomes found in a normal elephant cell, which typically has 112 chromosomes.
there is 4 pairs of chromosomes in each cell for a fly!