Recombination, or crossing over, is the process by which homologous chromosomes exchange genetic material during meiosis. This creates gametes with many different combinations of alleles, and is a major source of genetic variation in sexually reproducing species.
Sorting of genes as a result of meiosis.
Sorting of genes as a result of meiosis
adapt
Gametes fuse together during fertilization.
Any organisms which are able to breed and create non-sterile (capable of reproducing) offspring are said to be of the same species.
Speciation would not be possible without reproductive isolation. We define species today as a group of organisms capable of reproducing fertile offspring. If there was no reproductive isolation, it means that the organisms are constantly interbreeding, mixing their genes, thus unable to become two mutually reproductively exclusive groups, or different species.
the number of individuals in a population required for a the species to keep reproducing and not go extinct
Sexually-reproducing species have an advantage over asexually-reproducing species in their ability to use two different sex cells.
Sexually-reproducing species are able to adapt more easily than asexual-reproduciing species
adapt
Gametes fuse together during fertilization.
Ecological species concept.
Asexually reproducing organisms do not interbreed
each offspring in a sexually reproducing species inherits a unique combination of genes from its two parents. this combined set of genes contributes to a unique combination of traits in each individual
some bacteria...
The diversity of sexually reproducing species is a result of the fact that a) gene pools change over time (by selection and genetic drift) and that b) reproductive isolation occurs, leading to the inability of the descendants of formerly interbreeding subpopulations to interbreed (speciation).
Whatever species that isn't reproducing will die out.
absolutely. There are no asexually reproducing anole species that I am aware of.
Mutation, such as insertion, deletion and rarely frameshift mutation. Sexual recombination, is sexually reproducing species. This includes, in meiosis, the independent assortment of chromosomes and crossing over. Then there is random fertilization to provide a last source of variation.