What determines whether an allele is dominant recessive or codominant?
What determines whether an allele is dominant, recessive, or codominant? protein to function, then the normal allele is dominant. If both alleles contribute to the phenotype, they are codominant.
How are dominant and recessive traits inherited?
Although an individual gene may code for a specific physical trait, that gene can exist in different forms, or alleles. One allele for every gene in an organism is inherited from each of that organism’s parents. … Alleles produce phenotypes (or physical versions of a trait) that are either dominant or recessive.
Can you determine whether an allele is dominant or recessive on the basis of the ratio of phenotypes in a population explain your answer?
Can you determine whether an allele is dominant or recessive on the basis of the ratio of phenotypes in the population? No, because the phenotypic ratio depends on the allele frequency is of a dominant and recessive allele’s.
What does it mean when an allele is recessive?
Recessive refers to a type of allele which will not be manifested in an individual unless both of the individual’s copies of that gene have that particular genotype.
What makes an allele dominant recessive or codominant quizlet?
The nature of the gene’s protein product and its role in the cell; for example, if one copy of the normal allele can supply cells with enough. protein to function, then the normal allele is dominant. If both alleles contribute to the phenotype, they are codominant.
What causes allele dominance?
The simplest situation of dominant and recessive alleles is if one allele makes a broken protein. When this happens, the working protein is usually dominant. The broken protein doesn’t do anything, so the working protein wins out. A great example of a recessive allele is red hair.
What exactly is dominance Why are some alleles dominant and some recessive?
Dominant alleles regulate the expression of recessive alleles. … Dominant alleles are found at greater frequency than recessive alleles in populations. Students tend to think that every trait is represented by one gene and that each gene has two and only two alleles.
How can you tell if someone is heterozygous or homozygous for a trait that is dominant?
If the test cross results in any recessive offspring, then the parent organism is heterozygous for the allele in question. If the test cross results in only phenotypically dominant offspring, then the parent organism is homozygous dominant for the allele in question.