GENETICS AND EVOLUTION
EVOLUTION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
mistakes in translation of structural genes
|
|
|
mistakes in protein folding
|
|
|
rampant changes to the dictionary of the genetic code
|
|
|
binary fission
|
|
|
recombination by crossing over in meiosis
|
Detailed explanation-1: -Mutation and recombination are the two main sources of genetic diversity. Mutations introduce changes in nucleotide states, and therefore new variants.
Detailed explanation-2: -Key Points Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism’s offspring).
Detailed explanation-3: -So the correct option is ‘mutation’.
Detailed explanation-4: -Mutations are the original source of genetic variation. A mutation is a permanent alteration to a DNA sequence. De novo (new) mutations occur when there is an error during DNA replication that is not corrected by DNA repair enzymes.
Detailed explanation-5: -This process, also known as crossing over, creates gametes that contain new combinations of genes, which helps maximize the genetic diversity of any offspring that result from the eventual union of two gametes during sexual reproduction.