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What section of the DNA is inactive?
The inactive sections of DNA are typically referred to as heterochromatin. Heterochromatin is densely packed and generally not actively transcribed into RNA, which means the genes within these regions are usually not expressed. This contrasts with euchromatin, which is more loosely packed and often contains actively transcribed genes. In addition to heterochromatin, certain regulatory elements and non-coding regions may also be considered inactive.
Some of the portions of the chromatin are permanently condensed so that their DNA is never expressed All of these portions stain very intensely and are given a common name of?
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.
What trait is is expressed when two diffrent genes for the same trait are present?
A dominant trait is expressed when two different genes for the same trait are present.
What genes are expressed even when present on only one chromosome?
dominant genes
Which genes are dominant and which are recessive?
Dominant genes are always expressed in preference to recessive genes in cased where both genes are present.
What is condensed visible form of chromatin?
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.
What trait is expressed when two different genes for the same trait are present?
dominant
What is the differencs between dominant and recessive?
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
Why is a persons phenotype harder to predict than a persons genotype?
Because peoples appearances changes as their body changes.
Genes that are not expressed if a dominant gene is present are called?
Recessive genes. These genes are only observed when an individual inherits two copies of the recessive allele.
What is a trait that is not expressed when an organism receives genes for 2 different forms of a trait?
A trait that is not expressed when another is present is referred to as a recessive trait.
Genes that prevent the other gene from showing traits are called?
Dominant genes. Dominant genes are always expressed in an organism's phenotype when present, masking the expression of recessive genes.
