Do all germ cells have the same DNA?
To Genome, or Not to Genome! And which cell you are reading about. Most cells in our body have two copies of the genome with 6 billion base pairs of DNA. Germ cells only have one copy of the genome made up of 3 billion base pairs of DNA. When sperm and egg cells combine, that results in two genomes.
Is DNA methylation found in the genome of germ cells?
These allele-specific methylation imprints are established in germ cells and, after fertilization, they are maintained during embryonic development and in somatic tissues. As mentioned above, imprinted DMRs are erased in PGCs and subsequently remethylated, along with other genomic sequences, in a sex-specific manner.
What is germ cell gene?
A germ line is the sex cells (eggs and sperm) that are used by sexually reproducing organisms to pass on genes from generation to generation. Egg and sperm cells are called germ cells, in contrast to the other cells of the body that are called somatic cells.
Is promoter DNA or protein?
Promoter sequences are DNA sequences that define where transcription of a gene by RNA polymerase begins. Promoter sequences are typically located directly upstream or at the 5′ end of the transcription initiation site.
What is the difference between germ cells and somatic cells?
Germ cells produce gametes and are the only cells that can undergo meiosis as well as mitosis. Somatic cells are all the other cells that form the building blocks of the body and they only divide by mitosis.
How do all cells have the same DNA?
Almost all of the cells in your body share the same DNA as was found in that first cell*. This information is stored in the over 20,000 human genes found in almost all your cells. To get at the information, a gene must be turned on (expressed) and the information turned into something useful, a protein.
What is germ cell and somatic cell?
Are germ cells somatic?
“Somatic cells” is a fairly general term which refers to essentially all the cells of the body except for the germ line; the germ line being the cells in the sexual organs that produce sperm and eggs. So anything that doesn’t have the job of producing sperm or eggs is a somatic cell.
Is promoter a DNA?
​Promoter. A promoter is a sequence of DNA needed to turn a gene on or off. The process of transcription is initiated at the promoter. Usually found near the beginning of a gene, the promoter has a binding site for the enzyme used to make a messenger RNA (mRNA) molecule.
Which best describes a promoter?
The promoter is the non transcribed region of the gene. The process in which DNA directs the synthesis of proteins. Carries a genetic message from the DNA to the protein-synthesizing machinery of the cell.