If both alleles are dominant, it is called codominance?. The resulting characteristic is due to both alleles being expressed equally. An example of this is the blood group AB which is the result of codominance of the A and B dominant alleles.
What does it mean when an allele is expressed?
An organism which has two different alleles of the gene is called heterozygous. … A dominant phenotype will be expressed when at least one allele of its associated type is present, whereas a recessive phenotype will only be expressed when both alleles are of its associated type.
When both alleles express their effect on being present together the phenomenon is called?
When both alleles express their effect on being present together, the phenomenon is called codominance. As a result the heterozygous condition has a phenotype different from either of homozygous genotypes, e.g. AB blood group in humans.
When both parental alleles are?
One allele for every gene in an organism is inherited from each of that organism’s parents. In some cases, both parents provide the same allele of a given gene, and the offspring is referred to as homozygous (“homo” meaning “same”) for that allele.
What are multiple alleles characterized by?
So, the correct answer is ‘More than two alternate forms of genes found on same loci‘
When both alleles are equally expressed in a heterozygote it is called?
In some situations both alleles are expressed equally. A genetic scenario where neither allele is dominant or recessive and both get expressed is known as ‘codominance‘. Blood types are excellent examples of codominance.
Which allele is always written first?
The alleles are represented by letters. The letter chosen is usually the first letter of the trait.
Can a recessive gene be expressed with only one copy?
Recessive alleles are usually represented by lowercase letters and require two copies to be expressed.