Bacteria are prokaryotes. They can have a small circular piece of extrachromosomal DNA known as plasmid. As prokaryotes have one chromosome only,... View Article
Harmful alleles are recessive alleles more often than not. In most cases, they can be found perpetually in a population. Recessive traits are... View Article
In simpler terms, a gene is a portion of DNA and an allele is a version of a gene. A coding gene, which is a part of DNA, is used in the... View Article
Some examples of monogenic traits are sickle cell anaemia, Huntington disease, cystic fibrosis. Monogenic traits are produced by the action of... View Article
The ABO blood group in humans is a trait controlled by a single ABO gene with three types of alleles (multiple alleles) are seen. The 'a' and 'b'... View Article
When one allele is dominant over another, offspring exhibit a blend of parents' traits. The heterozygous phenotype in complete dominance is found... View Article
It is possible. The more allele options for a particular gene, the more is the possibility of combinations and hence more possible phenotypes,... View Article
In any case, dominant alleles are expressed (homozygous or heterozygous). Furthermore, two dominant alleles can mix to create a third phenotype -... View Article
If the alleles of a gene are different, then the dominant gene is expressed. The one whose effect is masked is recessive. Recessive alleles are... View Article
Sickle cell anaemia characteristic is found on a recessive allele of the haemoglobin gene. This corresponds to saying that one must have two... View Article
In snapdragon, the red flower is the dominant trait while the white flower is a recessive trait, hence the blending of two alleles. There is... View Article
Genes do not have a say in regulating various characteristics of an entity, however, the actual expression of a characteristic is based on which... View Article
New alleles can be formed as a result of mutations, it is the ultimate source. Mutations are permanent changes taking place in the sequences of... View Article
Yes, bacteria have alleles. Since they have an array of genes, they may contain multiple alleles too. Prokaryotes have a single chromosome hence... View Article
Alleles are different versions of a gene. They can be described to be either recessive or dominant on the basis of their linked characteristics.... View Article
Alleles can occur in pairs or multiple alleles affecting phenotype of a specific trait. As chromosomes occur in pairs for each characteristic,... View Article
If paired alleles are the same, the genotype of the entity is homozygous for that characteristic and if different, then the genotype is said to... View Article
In humans, ABO is regulated by three alleles known as IA, IB, and IO. Here I refer to isohemagglutinin. IA and IB are codominant, producing... View Article
Genes can have two or more possible alleles. Humans have two alleles or versions of each gene. As humans have two gene variants for each of the... View Article
