More than 7 times 1013 genetically unique offspring can be c

More than 7 times 10^13 genetically unique offspring can be created from a single human couple. What is the major reason for this diversity? Chromosomal fusion events Random assortment of chromosomes during meiosis Mitotic spindle formation Phenotypic impact of chemicals Mutations always have a negative impact on an individual, but the force of natural selection can help to correct this. True False Which position in the codons of protein coding regions is most likely n synonymous mutation if it undergoes a substitution? 1 2 3 All are equally likely

Solution

Please find the answers below and explanations in parentheses:

Answer 2: Choice 2 (random mating and further random cross over events during chromosomal division and meiosis represents the major force of evolution in sexually reproducing animals. Although the number of chromosomes are same, the mutual cross over events and extensive recombination always generates new combinations which are directly reflected in the genotype and phenotypes)

Answer 3: False (the mutations can have positive, negative or no effect on an individual depending upon the nature of mutation. Some mutations can be silent in nature which have no effect at all, whereas some mutations can help an individual to survive better in an environmental condition compared to others. When a mutation is favourable to an individual, the genetic forces further help to improve the survivability of that individual due to natural selection)

Answer 4: Choice 3 (The third position of the triplet codon represents the wobble position. It can have structural and functional similarity to a number of other codons and can create substitution mutations.)