Abdul Archive
Occurrence Polysiphonia is a marine alga. It is present along the coast of oceans. It is attached to the rocks or other substratum. Some members are epiphytes. Vegetative structure Plant body is composed of branched filamentous and basal attachment …
Mendel began working with the pair of characters,those were seed shape and seed color. The cross in which two traits are studied at same time is dihybrid. As we know the monohybrid cross for seed color (Y/y x Y/y), which gave a …
Historical development of the chromosome theory The theory and practice of genetics took a major step forward in the early part of the twentieth century with the development of the notion that the genes, as identified by Mendel, are parts …
Occurrence Majority of them are fresh water. They are also found on moist soil. They form dark green mats. General structure Vegetative structure The thallus is filamentous. The filament is cylindrical, branched, tubular, erect coenocytic. The filament is attached to …
Occurrence Volvox is freshwater algae. It makes water green. It appears in the spring. Vegetative structure Volvox forms colony. The colony of volvox is called coenobium (if the colony having fixed number of cells). It is spherical in shape. …
Occurrence Polypodium is a perennial herb. It is found mostly in temperate regions. It has worldwide distribution. Mostly is attached to some rocks. But some forms are epiphytic. General structure The plant body is sporophyte. Plant body is divided into …
Mendel’s model for the pea-color example, translated into modern terms, was as follows 1. A hereditary factor called a gene is necessary for producing pea color. 2. Each plant has a pair of this type of gene. 3. The gene comes …
The genetic approach to understanding any biological property is to find the subset of genes in the genome that influence that property, a process sometimes referred to as gene discovery. After these genes have been identified, their cellular functions can be elucidated …
The first-ever analysis of single-gene inheritance as a pathway to gene discovery was carried out by Gregor Mendel. His is the analysis that we shall follow as an example. Mendel chose the garden pea, Pisum sativum, as his research organism.The choice of …
Botulinum toxin is the most toxic substance known. It is made by the anaerobic bacterium, Clostridium botulinum , and is the cause of botulism, a severe form of food poisoning. It has been proposed as a biowarfare agent but has …