Razzaq Archive
DNA replication is more complex in eukaryotes in large part because there is a lot more DNA to copy. Transcription is more complicated in eukaryotes for following reasons. The larger eukaryotic genomes have many more genes to be recognized and …
The process of formation of RNA from DNA template. The first step of information transfer from gene to protein is to produce an RNA strand whose base sequence matches the base sequence of a DNA segment, sometimes followed by modification …
The process of doubling of DNA is called replication DNA REPLICATION IN PROKARYOTES Origin site: Replication starts at a single origin in the circular bacterial chromosome. The double helix opens up and both strands serve as template for the …
is a cross of a trihybrid (triple heterozygote) to a triply recessive tester. This kind of cross, called a three-point testcross, is a commonly used format in linkage analysis. The goal is to deduce whether the three genes are linked …
In Morgan’s study, the linked genes could not assort independently, but there were still some recombinants, which as we have seen, must have been produced by crossovers. In general, for genes close together on the same chromosome pair, recombinant frequencies …
In a dihybrid with genes on separate chromosomes,recombinants are produced by independent assortment,as shown in Figure 1. Let’s reconstruct a standard Mendelian analysis to illustrate how recombinants are produced: P A/A ; B/B x …
The production of new allele combinations is formally called recombination. Crossovers are one mechanism for recombination, and so is independent assortment. Recombination is observed in a variety of biological situations, but for the present let’s define it in relation to …
Tetrad analysis can also show two other important features of crossing-over. First, in one meiocyte several crossovers can occur along a chromosome pair. Second, in any one meiocyte these multiple crossovers can involve more than two chromatids. To think about …
The genes which reside on the same chromosome are said to be linked, and this phenomenon is called linkage. Linkage groups: All those genes which are located on the same chromosomes constitute a linkage group. For example, there are four …
Plant tissue culture is one of the most rapidly growing areas of biotechnology because of its high potential to develop improved crops and ornamental plants. With the advances made in the tissue culture technology, it is now possible to …