The rarity of asexual reproduction
among Mesocestoides tetrathyridia (Cestoda).
This asexual reproduction
also leads to an extreme genetic fixation in each population and without the possibility of sexual reproduction, a reduced genetic variability (Chao et al.
Gametophytes of some lycopods produce gemmae that allow indefinite asexual reproduction
of gametophytes (Treub, 1886a) and, in some cases, young sporophytes morphologically resemble their associated gametophyte (Fig.
He has studied other lizards that don't need males to reproduce, but he says that he's never encountered a vertebrate species in which the females switch to asexual reproduction
in a pinch.
Knowledge of the biology of this species is important due to the possible medical significance of its venom, its synanthropic character and its apparent proclivity for asexual reproduction
Sexual reproduction in animals and plants is far more prevalent than asexual reproduction
, and there is no dearth of hypotheses attempting to explain why.
Instead of referring to the act of asexual reproduction
, the bill instead redefines cloning of a human being to mean:
Fissiparity, asexual reproduction
in which an individual divides in two and regenerates missing parts, occurs in 34 of the 2,000 species of brittle star (Emson & Wilkie 1980).
But cloning, the most immediate and troubling result of human scientific mastery, promises asexual reproduction
for those who either cannot or do not want the heretofore "natural" variety.
Other sections of the book provide thought-provoking insight into matters such as natural selection, sexual selection, and the merits of sexual reproduction as opposed to asexual reproduction
The word cloning literally means asexual reproduction
, that is, reproduction without a partner.
It's interesting that if only one larva penetrates a snail, it can multiply into tens of thousands of larvae through asexual reproduction
As an initial matter, it is worth noting that, as recent research has indicated, asexual reproduction
is not limited to cloning.
And, by the way, the telomeres are restored to their full and original length in this process, so each organism is authorized another several hundred rounds of asexual reproduction
Not one male flower has been found, and scientists wonder whether the lack of genetic diversity offered by asexual reproduction
may doom the plant.