Regulatory sequences
The human genome has many different regulatory sequences
which are crucial to control gene expression.
short sequences that appear near or within genes.
A systematic understanding of these regulatory sequences and
how they together act as a gene regulatory network is only beginning to emerge
from computational, high-throughput expression and comparative genomics
studies.
Some types of non-coding DNA are genetic
"switches" that do not encode proteins, but do regulate when and
where genes are expressed.
These regulatory elements called gene promoters ( enhancer
and silencer regions).
Vertebrates have essentially the same genes and regulatory
gene sequences as humans, but with only one-eighth the "junk" DNA.
Genome
Expression
that describes all types of genes and DNA sequences owned by the organism in
the nuclei of cells. It carries the
instructions within the small units called genes, which lined up together in a
folder called chromosomes and the combination of genes within the portfolio are
all called genome
The genome is all the DNA in a cell.
All the DNA on all the chromosomes
Includes genes, intergenic sequences, repeats
Specifically, it is all the DNA in an organelle.
Eukaryotes can have 2-3 genomes
- Nuclear
genome
- Mitochondrial
genome
- Plastid
genome
If not specified, “genome” usually refers to the nuclear
genome.
Genomics is the study of genomes, including large
chromosomal segments containing many genes.
The initial phase of genomics aims to map and sequence an
initial set of entire genomes.
Functional genomics aims to deduce information about the
function of DNA sequences.
In the primitive genome: chromosome throat, usually one
Genome, in fact the nucleus:
Genome, in fact the nucleus:
1. Nuclear genome: all the genes and DNA sequences that exist in the single number of chromosomes in the nucleus of the cell.
2. Mitoconderia genome: chromosome throat and one or more.
3. Blastidi genome: chromosome throat and one or more.
And when we genome (genome) in eukaryotes, it is intended to nuclear genome normally.
Genome of the viruses: viral genome or viral chromosome: is the genetic material surrounded by the outer jacket.
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