Homologous
gene
Molecular
investigations by
developmental
biologists have
revealed
striking similarities
between the
structure of genes
(The hereditary
determinant of
a specified
characteristic of an
individual;
specific sequences
of nucleotides
in DNA.)
regulating
ontogenetic
phenomena in
diverse
organisms.
Homologous
structure
Characters in
different specieswhich were inherited from a
common ancestor
and thus
share a similar
ontogenetic
pattern.
Homology is...
Homologous
chromosome
One part of two
genetically different chromosomes.
Each homologous chromo-
some is
inherited from a
different
parent, and contains
information
about the same
gene sequence.
The
relationship of any two characters that have descended from a common ancestor.
This term can apply to a morphological structure, a chromosome or an
individual gene or DNA segment.
