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What are nucleotide segments of DNA molecules that make up genes and are expressed in the phenotype of an organism?
Genes are nucleotide segments of DNA molecules that code for specific proteins or RNA molecules. These genes are transcribed into messenger RNA (mRNA), which is then translated into proteins that ultimately determine the organism's phenotype.
Why do the recessive genes do not disappear from the population?
Recessive genes can persist in a population because they can be carried in individuals without being expressed. These hidden recessive genes can be passed down through generations, only showing up if inherited from both parents. Additionally, genetic diversity can help maintain recessive genes in a population even if they are not expressed in every generation.
What are needed to transfer a gene through a DNA molecule?
Genetics engineering is needed to transfer genes through DNA molecules.
How do genes make a phenotype?
They are expressed.
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 genes are expressed even when present on only one chromosome?
dominant genes
What molecule carries out our genes?
DNA molecules carry out our genes.
How are traits passed from parents to offspring?
Traits are passed from parents to offspring through the transmission of genes. Genes are sections of DNA that code for specific traits, and offspring inherit a combination of genes from both parents. This genetic information is then expressed in the offspring’s physical characteristics and traits.
An expressed gene is one that?
is transcribed into RNA. Promoters (I think that's what you meant, right?) don't function as genes; they stand as a signal for RNA polymerase to begin transcription of the actual gene, which begins about 25 base pairs downstream of the promoter region in eukaryotic DNA. Expressed genes DO code for proteins, but not all protein-coding genes are expressed. For example, the cells in your heart contain genes that code for proteins needed only in your liver. While those genes definitely code for proteins, they're not expressed. Expressed genes (and non-expressed genes, Ke$ha Looks like a man, for that matter) are made of DNA, not mRNA.
Are Genes present in heterochromatin readily expressed?
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.
What gene is always expressed?
Dominant genes will always be expressed however recessive genes would need to be inherited from both parents
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.
