36 Which technique is used to cure inheritable diseases by replacing mutant genes with goodgenes?a.Genetic diagnosisb. Genetic testingC.Genetic therapyd. All of these39 What is the study of entire genomes, including the complete set of genes, their nucleotidesequence and organization, and their interactions within a species and with other species?40 Which intracellular organelle DNA mutates at a rapid rate and is often used to studyevolutionary relationships?

An inheritable genetic change in the genetic material of an organism that gives rise to alternate forms of any gene is called mutation. An organism which shows novel phenotype other than wild type phenotype, because of presence of a mutation in the genome, it is called a mutant. Gene mutation can occur due to many reasons, like change in chromosome number, chromosomal aberrations, chemical change in the nucleotide structure of gene, etc. Genetic mutation can give rose to many diseases which can be inherited to the next generation.36. Genetic diagnosis is carried out by physicians based on an individuals phenotypic characters, family history to screen if there are any genetic abnormalities present. Genetic testing is also applied to find out the genetic makeup of an individual and to detect any genetic mutation, that might cause cancer like diseases. But these screening techniques do not cure the mutation induced diseased condition. Genetic therapy engages many techniques of genetic engineering which can cut out the portion of mutated gene(s) and replace with good gene(s) which can be translated into normal protein product that eliminates the disease condition. Hence correct option is (c) Genetic therapy. 39. The study of Molecular phylogenetics helps to study evolutionary biology. 40. Mitochondrial DNA mutates at a rapid rate and is often used to study evolutionary relationships.