Why are conditional alleles useful in studying genes with functions in essential cell processes?

Conditional genes enable to study the gene function by manipulating the gene of interest

Explanation:

Conditional alleles are widely used in molecular genetics to study gene function in target tissues or developmental stages. A conditional allele can be produced by introducing two recombinase recognition sites (SRSs) at flanking regions of the target gene, thereby deletion/inversion of these sites induced by a specific recombinase will produce a null allele. Generally, conditional alleles are designed by introducing LoxP sites flanking the gene of interest; however, classical gene targeting methods (i.e., by homologous recombination) have been historically used in order to produce conditional alleles.

the pic attached shows the stages of mitosis. hope it !

image result for describe the various types of gene mutationsghr.nlm.nih.gov

the types of mutations include: missense mutation: this type of mutation is a change in one dna base pair that results in the substitution of one amino acid for another in the protein made by a gene. nonsense mutation: a nonsense mutation is also a change in one dna base pair.

explanation: