Answer:
<em>This phenomenon occurred due to natural selection and evolution.</em>
Explanation:
Natural selection tends to favour organisms carrying the alleles which provide better traits to live in an environment. Evolution tends to change the allele frequency of a species with time depending on the adaptations which are more perfect to survive in an environment.
In the past, blue frogs lived in lakes. The colour of the lake matched with the colour of the frogs. As a result, these frogs could escape from their predators and hence were better adapted to survive in such an environment.
When the lake dried, the blue frogs were not adapted to live in the muddy environment as their colour no longer helped them to escape from the predators. As a result, natural selection favoured those organisms carrying brown colour and evolution changed the allele frequencies and increased the number of brown frogs.
Meiosis has two rounds of genetic separation and cellular division while mitosis only has one of each. In meiosis homologous chromosomes separate leading to daughter cells that are not genetically identical. In mitosis the daughter cells are identical to the parent as well as to each other.
Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell. ... Once the DNA in a cell is replicated, the cell can divide into two cells, each of which has an identical copy of the original DNA.
