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An allele is one particular form of a gene. A large population of living things typically have several different allele for any particular gene.
For example, one important gene in humans determines blood type compatibility. That gene comes in 3 different alleles -- A, B, and O.
Most plants and animals are diploid -- they have 2 of each gene, one inherited from each parent.
For example, any one human has one of six possible genotypes for that gene: AA, BB, OO, AB, AO, BO.
A recessive allele seems to disappear when paired with a dominant allele. If something has a dominant and recessive allele, the dominant will overshadow the recessive, but the recessive will still be there (just not showing). For example, the O allele is recessive when paired with the A allele, which is dominant, and so humans with the AO genotype as well as the AA genotype have "type A blood".
Only humans with the OO genotype show "type O blood".
According to the Wikipedia "allele" article, some people once thought that all genes had only one "normal" allele, which was both common and dominant, and all other versions of that gene (all other alleles) were rare and recessive.
However, most genes have many different "normal" alleles, whose frequencies vary from one population to another.
With some genes, the most common allele is recessive.
What else can I help you with?
What is the difference between dominant alleles and recessive alleles?
dominant-appears in first generation recessive-seems to dissapear
What is a factor that seems to disappear?
One factor that seems to disappear is the influence of luck or chance in certain situations, as people may attribute outcomes solely to skill or effort instead. This can lead to an overemphasis on personal responsibility and underestimation of external factors affecting success or failure.
When a solid dissolves in a liquid it seems to disappear into it. how is it possible?
The solid separates down to the molecular level - and they mix with the water molecules. We cannot see molecules with the naked eye !
A trait seems to disappear when two different genes for the same trait are present?
recessive
What word is used to describe when a substance seems to 'disappear' when mixed with water sometimes colouring it?
The term typically used is "dissolve." When a substance dissolves in water, it appears to disappear as its particles mix uniformly with the water molecules. This is a physical process and does not change the chemical composition of the substance.
A factor that seems to disappear?
a recessive allele
What is the difference between dominant and recessive alleles for specific traits?
Dominant is an allele that will always be expressed in a heterozygous individual. Recessive on other hand are traits that will only be expressed in a homozygous condition. Organisms receive one allele for each trait from each parent, thus you have two alleles for each trait.
Is the difference between a dominant and recessive allele?
dominant-appears in first generation recessive-seems to dissapear
What is the difference between dominant alleles and recessive alleles?
dominant-appears in first generation recessive-seems to dissapear
A trait that seems to disappear when two different genes for the same trait are present?
dominant
What describes a trait that is covered over or dominated by another form of the trait and seems to disappear?
A trait that is covered over or dominated by another form of the trait and seems to disappear is called a recessive trait. In genetics, recessive traits only manifest when an individual has two copies of the recessive allele.
What is the name of a factor that seems to disappear?
A factor that seems to disappear is often referred to as a "confounding variable." This is a variable that is not of primary interest in a study, but can influence the results if not properly controlled for. Identifying and addressing confounding variables is crucial to ensure the accuracy and validity of research findings.
What is a factor that seems to disappear?
One factor that seems to disappear is the influence of luck or chance in certain situations, as people may attribute outcomes solely to skill or effort instead. This can lead to an overemphasis on personal responsibility and underestimation of external factors affecting success or failure.
Why did one of the characteristics for example dwarfness or white flower color disappear in the F1 generation of Mendal's crosses?
Since the F1 generation of crosses is a cross between two pure traits (for example, TT for tall and tt for short/dwarfness), the offspring of the pure parents all have the genotype of Tt: 100% of offspring will be tall. The dwarfness seems to "disappear" because the capital T is dominant, while the lowercase t (for shortness) is recessive. Dominant dominates a recessive trait, so only tallness appears and dwarfness seems to disappear. Additional Info: However, even though the dwarfness seems to "disappear" it is still in the genotype although it does not appear in the F1 generation. In the F2 generation, there will be a 25% chance of the offspring having the trait dwarfness, because the F1 generation is crossed (Tt x Tt).
What is the difference between a dominant and recessive allele?
Dominant is an allele that can be expressed in a heterozygous individual (ie. Bb) or homozygous dominant (ie. BB). Recessive on other hand are traits that will only be expressed in a homozygous recessive (ie. bb) condition. Under normal circumstances, dominant alleles are the ones expressed in the phenotype, while the recessive allele is not. For example (an extremely simplified example) an heterozygous individual for eye color. (genotype Bb), has one dominant allele, 'B', and one recessive allele, 'b'. Given that B is for brown eyes, and b is for blue eyes, that individual's phenotype would be expressed as brown eyes (and be recessive for blue eyes). Organisms receive one allele for each trait from each parent, thus you have two alleles for each trait.
When a trait seems to disappear or doesnt show up often?
Recessive Trait
When a material seems to disappear into another substance?
absorption
