Colour blindness is a type X-linked recessive genetic disorder, which results in decreased ability to discriminate between colours. Males are... View Article
Dominance refers to a relationship between two alleles or variants of the same gene, whereas epistasis refers to a relationship between alleles... View Article
Pleiotropy is a condition, when a single gene exhibits multiple phenotypic effects, e.g. mutation in a gene causing phenylketonuria, shows... View Article
Yes, tall is a dominant trait of stem height in the pea plant. Tallness is dominant over dwarfness and expressed in the phenotype of heterozygous... View Article
No, a person cannot be a carrier for a dominant genetic disorder. Dominant genetic disorders require only one copy of a defective gene to develop... View Article
The dihybrid cross between RrYy and RRYY will give all the plants with the phenotype of Round and yellow seed, i.e. all the plants will show the... View Article
The notation Tt means the heterozygous condition, wherein the homologous pair contains different alleles of a gene. One homologous chromosome... View Article
A dominant allele is called dominant because it masks the recessive trait and is expressed in the phenotype of a heterozygous organism. Only a... View Article
Blood group type is controlled by a gene I, which has three alleles IA, IB and i. Allele A and B are dominant over i. Blood type BO is a genotype... View Article
AB positive blood type is called the ‘universal recipient’. It can receive blood from any of the blood types. Further reading: Polygenic... View Article
Blood group type is controlled by gene I, which has three alleles. Allele A and B are codominant and are expressed together in a heterozygous... View Article
Blood groups are inherited from both the parents. Inheritance of the blood group is controlled by a gene I, which has 3 types of alleles, viz.,... View Article
The most dominant eye color is brown. Eye colour shows polygenic inheritance and the expression is governed by multiple genes. Further reading:... View Article
Eye colour is determined by multiple genes. Genes, which determine eye colour are associated with melanin production, storage and transport.... View Article
When both the alleles are codominant and are expressed in phenotype of a heterozygote, then it is known as codominance. Codominance differs from... View Article
Codominance leads to expression of traits of both the alleles in the phenotype of a heterozygote, that is the key to recognise codominance. Here... View Article
