Gene is located inside chromosome on specific location called locus.
Gene has alternative form or other form which is known as aIIeIe. Gene
and allele are represented by capital and lowercase Latin letters. So, gene
also has pair just like chromosome.
|Gene location in chromosome. Gene and allele are symbolized by capital and lower case letter. Both of them can be found in specific location (locus)|
a pair of homologous chromosomes
gene in locus
a pair of alleles of a gene in locus
three pairs of genes (in three locus) or three pairs of alleles
The term of gene was first stated by W. Johannsen in 1909. Prior to
that, Mendel, de Vries, and Tshemark called it as X factor. Based on their
research, the X factor was considered to be very important in controlling
Gene is a series of nitrogen base triplet within DNA strand. A series of
triplet will encode one polypeptide chain which then will be the part of
one enzyme or other protein. The gene is able to manage all metabolism
processes and determine various characteristics or traits (such as eye
color, nose shape, and hair type).
Gene is composed of genetic material with chemical messages. Gene
can be bequeathed from one generation to another so that offsprings may
have some similar characteristics with their parents.
Source: Biology. The Unity and Diversity of Life, 2004.