After crossing , there will be some new features , which r 50% from parental nd 50% from new combination. so, we can see new speciation in an organism.

Introduction:
During the process of crossing or mating in genetics, new features that are not present in the parents can appear in the offspring. This phenomenon is known as genetic recombination or genetic variation. It is one of the key mechanisms responsible for the diversity and evolution of species.

Explanation:
Genetic recombination occurs due to two main processes: crossing over and independent assortment.

Crossing Over:
During meiosis, the process of cell division that produces gametes (sperm and egg cells), homologous chromosomes pair up and exchange genetic material through a process called crossing over. This exchange of genetic material occurs at specific points called chiasmata. Crossing over leads to the reshuffling of genetic information between the chromosomes, resulting in the creation of new combinations of genes.

Independent Assortment:
Independent assortment occurs during meiosis when homologous chromosomes separate and are randomly distributed into daughter cells. Each pair of homologous chromosomes aligns independently of other chromosome pairs, leading to a random distribution of genetic material. As a result, the combination of genes inherited from the parents is not predetermined, and the offspring can inherit different combinations of traits.

Benefits of Genetic Recombination:
1. Increases Genetic Diversity: Genetic recombination leads to the generation of new combinations of genes, increasing the genetic diversity within a population. This diversity is essential for the adaptation and survival of species in changing environments.

2. Enhances Adaptability: The appearance of new features in offspring allows for the potential adaptation to new environmental conditions. These new traits may provide advantages in terms of survival, reproduction, or competition, leading to the evolution of species.

3. Elimination of Harmful Mutations: Genetic recombination can also help in eliminating harmful mutations. If one parent possesses a harmful mutation, the crossing over and independent assortment processes may result in the offspring inheriting a non-mutated version of the gene from the other parent, reducing the negative effects of the mutation.

Conclusion:
The appearance of new features in offspring that are not present in the parents is a result of genetic recombination, primarily through crossing over and independent assortment during meiosis. This process leads to the reshuffling of genetic material, increasing genetic diversity, promoting adaptability, and potentially eliminating harmful mutations. It is through these mechanisms that species evolve and adapt to their changing environments.