In scanning electron microscopy, the beam of electrons is scanned across the surface of a sample in a raster pattern. The image is formed by secondary electrons emitted from the surface when they are excited by the electron beam.
In scanning electron microscopy is a type of microscpe, the beam of electrons is scanned across the surface of a sample in a raster pattern. The image is formed by secondary electrons emitted from the surface when they are excited by the electron beam. It is capable of much higher magnifications and has a greater resolving power than a light microscope, allowing it to see much smaller objects in finer detail. There are two types of electron microscope, namely; Transmission electron microscope and Scanning electron microscope. Unlike the TEM, where the electrons in the primary beam are transmitted through the sample, the Scanning Electron Microscope (SEM) produces images by detecting secondary electrons which are emitted from the surface due to excitation by the primary electron beam.
The Principle of Independent Assortment illustrates how different genes individually separate from one another when reproductive cells receive.
Independent assortment of genes and their similar traits was first mentioned by Gregor Mendel in 1865 during his studies of genetics in pea plants.
When two or more characters are acquired, individual hereditary factors classify independently during gamete production, giving distinct traits an equal opportunity of befalling together.
Uracil (U) is a nitrogenous base found only in RNA but DNA is deprived of it. In DNA Thymine is found. in DNA adenine (A), guanine (G), thymine (T) and cytosine (C) are present. whereas uracil replaces thymine in case of RNA.