What does a chromosome carry?
Chromosomes carry genetic information in a molecule called DNA. A type of cell division called mitosis ensures that when a cell divides each new cell produced has the same genetic information. DNA exists in a cell’s nucleus within structures called chromosomes .
What are each of the chromosomes for?
Each one of our cells contains 23 pairs of chromosomes; one of the chromosomes comes from our mother and the other from our father. Like a recipe book, each chromosome contains a certain number of recipes, known as ‘genes’. Over 20’000 genes are recipes for proteins which are essential components of life.
Does each chromosome carry the same information?
Different chromosomes contain different genes. That is, each chromosome contains a specific chunk of the genome. For example, in humans the gene for alpha globin, a part of the hemoglobin protein that carries oxygen in red blood cells, is found on chromosome 16.
What chromosome is a male?
Each person normally has one pair of sex chromosomes in each cell. The Y chromosome is present in males, who have one X and one Y chromosome, while females have two X chromosomes.
What comes first DNA or genes?
RNA has great capability as a genetic molecule; it once had to carry on hereditary processes on its own. It now seems certain that RNA was the first molecule of heredity, so it evolved all the essential methods for storing and expressing genetic information before DNA came onto the scene.
What are the 4 stages of the cell cycle?
In eukaryotes, the cell cycle consists of four discrete phases: G1, S, G2, and M. The S or synthesis phase is when DNA replication occurs, and the M or mitosis phase is when the cell actually divides. The other two phases — G1 and G2, the so-called gap phases — are less dramatic but equally important.
What happens when you have 47 chromosomes?
Humans have 23 pairs of chromosomes. A trisomy is a chromosomal condition characterised by an additional chromosome. A person with a trisomy has 47 chromosomes instead of 46. Down syndrome, Edward syndrome and Patau syndrome are the most common forms of trisomy.
What is the 5th chromosome responsible for?
Because chromosome 5 is responsible for many forms of growth and development (cell divisions) changes may cause cancers.
|No. of genes||839 (CCDS)|
|Centromere position||Submetacentric (48.8 Mbp)|
|Complete gene lists|