Describe the possible effects of a mutation on an organism. describe an example for each effect you mention.

1) No real change in a the phenotype
The genetic code of an organism is very long, and not all segments correspond to a phenotype. Often, a mutation in an organism will result in no noticeable change in any phenotype, meaning there will be no visible effect of the mutation on the organism. 

2) A small change in a phenotype. 
Somtimes a mutation will render a very small change in the phenotype of an organism. One example is a certain type of birthmark, which is caused by a single mutation. 

3) A significant change in the phenotype. 
A mutation can also lead to significant changes in the phenotype of the organism. One example is a mutation that causes bacteria, or other organisms, to become resistant to viruses or antibiotics. This mutation causes a huge change in the organism's survivability (fitness), and thus will cause it to be passed on often to new organisms. 

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.

Idont really understand