Abdul Archive
Types of fruit body: There are number of fruit bodies in Ascomycota. In yeasts and related fungi the asci are not enclosed by hyphae, but in most ascomycetes they are surrounded by hyphae to form an ascocarp or ascoma. An old term for …
Transgenic animals, mostly mice, are of great value in the genetic analysis of inherited diseases and cancer. Here we are interested not so much in adding a cloned transgene as in discovering the function of genes already present. The general …
NEW AND IMPROVED ANIMALS For thousands of years people have improved crop plants and domestic animals by selective breeding, mostly at a trial-and-error level. Woollier sheep and smarter sheep dogs have both been improved through many generations of selective breeding. …
Another issue with transgenic plants is the effect they may have on nontarget organisms , that is, any plants or animals inadvertently exposed to the transgenic crop or insecticide. An article in the journal Nature suggested that Monarch butterflies were …
Plants are highly adaptable and have many mechanisms to survive environmental stresses. Drought and high salinity of irrigation water are two stresses that pose problems in growing crop plants. In drought-tolerant plants, fungi, and bacteria, the sugar trehalose protects the …
Although weeds are a nuisance, even worse enemies of plants, and correspondingly more expensive to farmers, are: 1 . Insects and roundworms 2 . Fungal diseases (molds, blights, rusts, and rots) 3 . Viral diseases of plants It is possible …
Herbicides cost the world’s farmers more than $12 billion each year. Yet despite this, around 10% of the crop is lost due to weeds. One problem is that many of the chemicals used do not discriminate between crops and weeds. …
Another strategy for getting a gene of interest into plant tissue is to blast the DNA through the plant cell walls with a particle gun. Unlike Ti plasmid transfer by Agrobacterium , this technique works with all types of plants. …
The first step in genetically engineering a plant is to identify a gene that will confer a specific desirable trait on the plant. In some ways, this is the hardest part of genetic engineering. The most desirable traits for a …
BACs Bacterial Artificial Chromosomes, i) use fertility F plasmid ii) 75-300 kb inserts possible iii) Developed during the humane genome project YACs Yeast Artificial Chromosomes i) Mimics Yeast chromosome ii) Contains all regions for replication (Yeast Ori and centromere) iii) …