The genes inserted into foreign cells cannot be reproduced. However, we may cope with this problem, if genes are inserted into a structure, which... View Article
Some damage to DNA may occur due to the action of different agents or during protein biosynthesis. Many of those damages are corrected by special... View Article
During human ovulation, an ovum is liberated from the ovarium. It is surrounded by a layer of follicular cells, which is bonded to each other by... View Article
Androgenesis is a type of sexual reproduction when embryo development is performed from male nuclei and female cytoplasm. It may take place in... View Article
The following are the postulates of the genetic code - AUG - is a start codon In the genetic code in most cases, one amino acid corresponds... View Article
The constitutive heterochromatin is in the telomere regions and regions adjacent to the centromere and along with some internal fragments. It is... View Article
Three types of DNA replication can be distinguished: conservative, semiconservative, dispersive. All these types allow making a daughter DNA... View Article
It is a characteristic feature of all echinoderms. It includes a system of canals within the body in which the seawater circulates. The water... View Article
Mutations are large changes occurring spontaneously in the natural population. These changes are heritable, producing new species. Thus,... View Article
They are the external openings of the tracheal tubes. There are 10 pairs of spiracles. Out of which, The 1st two pairs are situated in the... View Article
It represents the lower lip and covers the mouth from the ventral side. It is also called the second maxillae as it is supposed to be formed by... View Article
Cockroaches are nocturnal entities, in such entities, images are formed by the overlapping of images, a blurred image is obtained. Compound eyes... View Article
Sometimes one of few individuals gets dispersed from the parent population due to various reasons. The dispersed individuals may not exactly... View Article
Following are the features of genetic drift- It is an evolutionary force operating in a small population Here, the gene frequency in a small... View Article
The gene pool is not static. It may become large or smaller depending on the external or internal influences. The Gene pool may become larger by... View Article
Variation is the difference in character between individuals of common descent. According to Darwin, no two members of any species are exactly... View Article
Because of the prebiotic environmental conditions, atoms of inorganic gases were continuously breaking apart and recombining to form new... View Article
Transfer RNA (tRNA) is called so as it transfers the amino acids required for protein synthesis. It forms about 10-12% of the total RNA in the... View Article
Messenger RNA (mRNA) is called so because it carries the message from DNA to the cytoplasm. It was discovered in E.Coli bacteria by Volkin, and... View Article
