Mutations are a change in the nucleotide sequence in the DNA. Mutations are the primary cause of genetic variation. Mutations can be harmful and... View Article
Operator is the regulatory region overlapping the promoter of the lac operon. Repressor protein binds to the operator and inhibits binding of RNA... View Article
Genetic code refers to the trinucleotide sequence present on mRNA transcript, which codes for a specific amino acid. Genetic code is nearly... View Article
The fundamental unit of evolution is the population. Evolution refers to the change in the inherited characteristics or gene pool of a population... View Article
Mutation is the change of nucleotide sequence in DNA due to various factors. It leads to variation and is one of the major driving forces of... View Article
Migration is the movement of genes and also referred to as gene flow, which changes the allele frequencies of a population. Genetic drift is the... View Article
The term genetic drift was coined by Sewall Wright. It refers to the random fluctuations in allele frequencies of a population occurring by... View Article
Haemophilia is a blood clotting disorder due to deficiency of a clotting factor. It is of three types with each related to different clotting... View Article
Traits, which do not segregate according to Mendel’s law of segregation or do not follow the law of dominance, show Non-Mendelian inheritance.... View Article
Heredity is the passing on of traits from one generation to another. Heritable traits are passed on from parents to their offspring via DNA.... View Article
Gene flow is the migration of genes from one population to another. Gene flow changes the allele frequencies of a population. Gene flow within a... View Article
There are structural differences between RNA and DNA. RNA is single-stranded and contains a ribose sugar which makes it more unstable and prone... View Article
The child inherits genes for blood type from parents. Each parent gives one of the gene pairs. ABO blood group is determined by the gene I. It... View Article
ABO blood group type is determined by the gene I. It has three variant alleles, i.e. IA, IB and i. IA and IB produce surface antigens A and B,... View Article
AB blood group has both the surface antigens on RBCs. The genotype for the AB blood group is IAIB, so if both husband and wife have AB blood... View Article
Humans are closely related to chimpanzees and bonobos. 98.7% of human DNA is similar to them. The common ancestor of humans, bonobos and... View Article
Yes, the AB blood group is found to be the least prevalent in India. Only ~7% of people are found to have AB blood type. AB blood group has... View Article
Inbreeding refers to the mating of closely related animals of the same breed. Inbreeding is done to develop purelines. It increases the... View Article
ABO blood grouping is controlled by gene ‘I’, which has three variants, viz., IA, IB, and i. IA and IB are codominant over allele i. Blood type O... View Article