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Dominant or Recessive?
Transcript of Dominant or Recessive?
Are the following traits
This trait is reportedly due to a single gene; the presence of freckles is dominant.
Colorblindness is due to a recessive allele located on the X chromosome. Women have two X chromosomes, one of which usually carries the allele for normal color vision. Therefore, few women are colorblind. Men only have one X chromosome, so if they carry the allele for colorblindness, they will exhibit this trait. Thus, colorblindness is seen more frequently in men than in women.
Some scientists have reported that handedness is due to a single gene with right handedness dominant and left handedness recessive. However, other scientists have reported that the interaction of two genes is responsible for this trait
Some scientists have reported that this trait is due to a single
gene for which unattached earlobes is dominant and attached
earlobes is recessive. Other scientists have reported that this
trait is probably due to several genes.
Hairline shape is reportedly due to a single gene
with a widow’s peak dominant and a straight hairline
Genes store the information needed for the cell to assemble proteins, which eventually yield specific physical traits.
Most genes have two or more variations, called alleles.
For example,the gene for hairline shape has two alleles – widow’s peak or straight.
An individual may inherit two identical or two different alleles from their parents. When two different alleles are present they interact in specific ways.
The alleles interact in what is called a dominant or a recessive manner. The traits due to dominant alleles are always observed, even when a recessive allele is present. Traits due to recessive alleles are only observed when two recessive alleles are present.
A widespread misconception is that traits due to dominant alleles are the most common in the population. While this is sometimes true, it is not always the case.
An allele is dominant if its effect masks the effect of a recessive allele paired with it.
-Broad Lips -Thin Lips
-Dwarfism -Normal Growth
-Hazel Eyes -Blue or Grey Eyes
-Nearsightedness -Normal Vision
A widespread misconception is that traits due to dominant alleles are the most common in the population.
While this is sometimes true, it is not always the case.
DOMINANT:As the word says it tries to be bossy and prevents the recessive one from expressing itself !
RECESSIVE:Too submissive. It does not fight with the dominant allele. It just allows the Dominant allele to get expressed !