"Variations" are seen in the organism . State the two main cause of variation
Answers
Diversity is a variation in any structure, function or character that separates one person from another. This is a natural phenomenon and is caused by crossing (exchange of genes during myosis) and mutation. Advantages: - 1. It separates each individual from each other so that each person has their own identity and can be easily identified. 2. It improves some of the characters in some characters which will help them survive in extreme situations.
Mutations are the ultimate source of various alleles. However, the organism is "yoga" of these alleles. Sexual reproduction and crossover events in the myosis make new "amounts", so there are variations between organisms. In sum, in mutation, mutations, sexual reproduction, and crossover
* The last source of difference between the organisms * or * * population - is mutual mutation. In the population of organisms, new mutations are presented with random mistakes in the DNA copy of each mutation. Most of these mistakes have no effect, or they are very bad, but their effects are so small that they are made in the population because it is growing.
This change is maintained firmly for those who can have sexual relations for organisms. Gender essentially takes DNA from both parents, connects them together, and randomly distributes hybrids to children. Mutations are mixed and consistently matched, which allows the population to test new combinations of genomes at all times. (It is likely that two humans have the same DNA sequence essentially zero in the history of life - of course the monogenic twin is not included.)
Extraordinary creatures who can not exchange any kind of genetic material, the story is a little different. In every 'child' in the population, there is an exact DNA similar to 'parents' except for a mutation or two. Therefore, over time, the population receives some changes in fuel refueling by unique mutations with each reproduction.
But eventually, there is going to be a child who receives a mutation which is extremely beneficial. Since the resources are limited, the child will take the entire population (as such, all people except new beneficial mutations will become extinct), thereby causing total loss of variation. This process is repeated because the population is evolving, which essentially causes a bounce and bust of variation in the unequal population.