Question

The biological species concept is based on the assumption that species are reproductively isolated and do not share genes. And yet a number of organisms that are considered different species hybridize (mate and exchange genes). Hybridization between different species is more common in plants than in animals. Propose some possible reasons for this difference.

Answer 1

ANSWR :-

Hybridization is the process in which the individual of different species or same species interbreed together. If the species are different than it is known as interspecific hybridization and when the genetically divergent individual from the same species than it is known as intraspecific hybridization. The offspring produce by hybridization may be fertile, partially fertile, or sterile. Hybridization between different species is more common in plants than in animals.

Plants hybridize much more frequently and successfully than animals, the reasons are:-

pollination : the pollens of flowering plants disperses widely and may land on the flowers of different species and results in hybrid variety, hybrid variety is always prefer as more superior than parents..

In plants, the chromosomal doubling occurs more frequently than animals and this facilitates the fertility of the hybrid plant offsprings..

Plant forms are less stringent controlled than animal forms, therefore the intermediate forms of the plants is more likely to be physiological successful.