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Chromosomes are made of tightly wound DNA and protein. Genes are found along the length of chromosomes. A gene is a segment of DNA that contains instructions for making a specific protein or proteins required by the body. Human beings have about 30,000 - 35,000 genes. We have two copies of each gene, but the copies can be slightly different. For example, the gene associated with cystic fibrosis has more than 1000 different variations.
Different versions of the same gene are called its alleles, and everyone has two alleles for each gene. (Males have only one X chromosome, so they only have one copy of the genes located on the X chromosome.)
What else can I help you with?
A gene is said to have multiple alleles if it has more than how many alleles?
A gene is said to have multiple alleles if it has more than two different forms or variants (alleles). This means there are more than two variations of the gene present in a population.
What is the condition whereby a trait is determined by three or more alleles called?
The condition whereby a trait is determined by three or more alleles is called multiple allelism. Multiple alleles refer to the presence of more than two alleles of a gene within a population. This can result in various combinations of traits and phenotypes.
What are genes with three or more alleles called?
this makes no scientific sense. A gene (which determines a phenotypic trait) can only contain 2 alleles. However codominace allows for multiple alleles to be chosen from, but only 2 picked for a gene. Also, if multiple genes determine a phenotypic trait that's polygenic inheritance.
What are alleles that have an effect on an organisms phenotype?
Alleles that have an effect on an organism's phenotype are called dominant alleles. Dominant alleles mask the effects of recessive alleles in heterozygous individuals, resulting in the dominant allele's phenotype being expressed.
Alternative versions of a gene?
Alternative versions of a gene are called alleles. Alleles are different forms of a gene that can result in distinct traits or characteristics. These variations in alleles contribute to genetic diversity within a population.
A gene is said to have multiple alleles if it has more than how many alleles?
A gene is said to have multiple alleles if it has more than two different forms or variants (alleles). This means there are more than two variations of the gene present in a population.
What is the condition whereby a trait is determined by three or more alleles called?
The condition whereby a trait is determined by three or more alleles is called multiple allelism. Multiple alleles refer to the presence of more than two alleles of a gene within a population. This can result in various combinations of traits and phenotypes.
If a population of an organism shows more than two alleles for a characteristic what is that called?
codominance
Recessive allele is more common or dominant allele?
Not necessarily. I think the dominant genes are more common, but there are lot of exceptions out there. For example, having six fingers in humans is a dominant gene, but it isn't all that common.
What is it called when one trait is controlled by 4 alleles?
When one trait is controlled by four alleles, it is referred to as multiple allelism. In this genetic scenario, more than two alleles exist for a single gene within a population, leading to a variety of possible phenotypes depending on the combination of alleles present in an individual. An example of this is the ABO blood group system in humans, where four alleles (IA, IB, i) determine blood type.
What are more than two alleles that exist in a population for a particular trait?
Multiple alleles
What are genes with three or more alleles called?
this makes no scientific sense. A gene (which determines a phenotypic trait) can only contain 2 alleles. However codominace allows for multiple alleles to be chosen from, but only 2 picked for a gene. Also, if multiple genes determine a phenotypic trait that's polygenic inheritance.
What is the difference in between a trait and an allele?
A trait is generally expressed phenotypically. An allele is one of a pair alleles at the same locus...often referred to as a gene. An allele is present whether expressed or not. A single gene locus will have two alleles in an individual, but there may be more than 2 alleles for this locus in the population. General human blood groups are an example of this with A,B, O as the primary alleles and several other less common ones...(like M) present in the population.
A population of an organism sHow is more than two alleles for a characteristic this is a case of?
This is a case of multiple allelism. Multiple allelism refers to the presence of more than two alleles for a particular gene in a population. Each individual will still only have two of these alleles.
Alleles that have more influence in determining traits are?
Dominant alleles are more influential in determining traits because they will be expressed even if only one copy is present. Conversely, recessive alleles are less influential as they will only be expressed if two copies are present.
What are alleles that have an effect on an organisms phenotype?
Alleles that have an effect on an organism's phenotype are called dominant alleles. Dominant alleles mask the effects of recessive alleles in heterozygous individuals, resulting in the dominant allele's phenotype being expressed.
What is the multiple allele system?
The multiple allele system refers to a genetic system where a particular gene has more than two alleles present within a population. Each individual carries a maximum of two alleles for a gene, but the population as a whole may have multiple alleles. An example of this is the ABO blood group system in humans.
