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what is the phenotypephenotype is every observable characteristic of a living being conditioned by its genes a few phenotypes may be altered by
are the alleles of a gene essentially originated one from the father and the other from the mother are there exceptionsit is natural so that alleles
define disadvantages of direct microscopic count1 small cells are difficult to see under the microscope and may be missed2 it gives total count ie
define advantages of direct microscopic count1 it is easy inexpensive and relatively quick method2 it gives information regarding size and morphology
explain direct microscopic count - measurement of microbesthe most obvious way to determine microbial number is through direct counting under a
what is quantitative techniquesmicrobial quality of substances like food milk air water soil etc can be assessed both qualitatively and
explain the quantitative techniquesnow that we are well-versed with the techniques involved in preparing and maintaining cultures it is also
what are the alleles of a genethe diploid individuals have paired chromosomes for instance in humans there are 23 pairs of chromosomes totaling 46
what is signifying by gene locusthe gene locus locus means place is the location of a gene in a chromosome that is the position of the gene in a dna
how is the concept of chromosome related to the concept of the genea chromosome is a dna molecule and chromosome may contain several different genes
is gene a triplet of consecutive dna nucleotidesa gene isnt a triplet of dna nucleotides with their respective nitrogen-containing bases like cgt or
explain precautions for isolation of pure culture1 plating of the medium should be done 24 hours before performing the streakingthere should not be
explain procedure for isolation of pure culturenow carry out the exercise following the steps enumerated herewith1 label the name of the organism on
define laser tweezers technologyin addition to above said classical methods advance technologies can be used for obtaining pure cultures laser
define most probable number mpn methodthe mpn method is like agar shake tube method where no agar is used the dilutions of the microbial suspension
define the agar shake tube methodthe agar shake tube method is useful for isolation of anaerobic microorganisms what are anaerobic microorganisms you
explain the disadvantages of colonies obtained at different dilution1 heat sensitive microorganisms may be damaged by melted agar giving low viable
define advantages of colonies obtained at different dilution1 as colonies grow both on the surface and beneath the agar surface so aerobes
explain the pour plate methodisolated colonies can also be obtained by pour plate method the method involves mixing of small volume of microbial
explain advantages and disadvantages of spread plate methodthe advantages and disadvantages of spread plate method are highlighted
define the streak plate method - pure culture techniquesthe method was developed by loeffler and gaffkey in the laboratory of robert koch the streak
explain the plating method - pure culture techniquesplating method is one of the commonly employed methods for getting a pure culture the
what are pure culture techniquesmicroorganisms can be isolated from various natural environments like soil food water sewage decomposing matter and
explain pure culture techniqueswe learnt the techniques involved in sub-culturing ie the process involved in transfer of culture from one medium to
explain the precautions for sub-culturing of a culture1 sterilization of inoculating wire before and after the transfer is a must sterilized wire