No. Heterochromatic regions of DNA are not readily expressed as they are densely packaged. Some of these regions do not code for genes at all.
These condensed portions of chromatin are called heterochromatin. They are tightly packed regions of DNA that are typically transcriptionally inactive, meaning the genes within them are not actively expressed. Heterochromatin appears densely stained under a microscope due to its tight packing of DNA.
A dominant trait is expressed when two different genes for the same trait are present.
dominant genes
Dominant genes are always expressed in preference to recessive genes in cased where both genes are present.
Heterochromatin Heterochromatin is a tightly packed form of DNA or condensed DNA, which comes in multiple varieties. These varieties lie on a continuum between the two extremes of constitutive heterochromatin and facultative heterochromatin. Both play a role in the expression of genes.
dominant
Dominant genes are genes that are expressed more readily than recessive genes, i.e. if you had a genotype that was AaBb, A being for brown hair, a for blonde hair, B for brown eyes, b for blue, you would have brown hair and brown eyes as the genes for those phenotypes are dominant. For recessive genes to be expressed in the phenotype the gamete needs to have recessive genes for both "slots", e.g. AA for blonde hair to be expressed or bb for blue eyes to be expressed. Edd
A trait that is not expressed when another is present is referred to as a recessive trait.
Recessive genes. These genes are only observed when an individual inherits two copies of the recessive allele.
Because peoples appearances changes as their body changes.
Dominant genes. Dominant genes are always expressed in an organism's phenotype when present, masking the expression of recessive genes.
In genetic inheritance, dominant genes are versions of genes that are expressed over recessive genes. Dominant genes mask the effects of recessive genes when they are present together in an individual's genetic makeup.