Year: 2022

Plastic microbeads ban enters force in UK View in LinkedIn

DOMINANT QUESTION. "The mysteries of meiosis call for new developments of evolutionary theory. Overall, all these mysteries tend to have been overshadowed by the famous question of the maintenance of sex." http://biorxiv.org/content/biorxiv/early/2016/04/28/050831.full.pdf View in LinkedIn

BIOLOGICAL FUNCTION OF SEX? "Why is sexuality (and meiosis) so common? This is one of the important unanswered questions in biology and has been the focus of much research beginning in the latter half of the twentieth century." https://lnkd.in/exK5mn7 View in LinkedIn

TWO FOLD COST. "The evolution of sexual reproduction is a major puzzle for biologists. The two-fold cost of sex is that only 50% of organisms reproduce and organisms only pass on 50% of their genes." https://lnkd.in/e3hvRP7 View in LinkedIn

ASEXUAL ADVANTAGE. "In most multicellular sexual species, the population consists of two sexes, only one of which is capable of bearing young (with the exception of simultaneous hermaphrodites). In an asexual species, each member of the population is capable of bearing young. This implies that an asexual population has an intrinsic capacity to grow more rapidly with each generation." (John Maynard Smith). https://lnkd.in/eQbyfmX View in LinkedIn

ANISOGAMY. "It is widely believed that a disadvantage of sexual reproduction is that a sexually reproducing organism will only be able to pass on 50% of its genes to each offspring. This is a consequence of the fact that gametes from sexually reproducing species are haploid. This, however, conflates sex and reproduction which are two separate events. The "two-fold cost of sex" may more accurately be described as the cost of anisogamy. Not all sexual organisms are anisogamous." https://en.m.wikipedia.org/wiki/Evolution_of_sexual_reproduction#Two-fold_cost_of_sex View in LinkedIn

ISOGAMY. "There are numerous species which are sexual and do not have this problem because they do not produce males or females. Yeast, for example, are isogamous sexual organisms which have two mating types which fuse and recombine their haploid genomes. Both sexes reproduce during the haploid and diploid stages of their life cycle and have a 100% chance of passing their genes into their offspring." https://en.m.wikipedia.org/wiki/Evolution_of_sexual_reproduction#Two-fold_cost_of_sex View in LinkedIn

GENETIC FRESHNESS. "Sexual reproduction must offer significant fitness advantages to a species because despite the two-fold cost of sex, it dominates among multicellular forms of life, implying that the fitness of offspring produced outweighs the costs. Sexual reproduction derives from recombination, where parent genotypes are reorganized and shared with the offspring. This stands in contrast to single-parent asexual replication, where the offspring is identical to the parents. https://en.m.wikipedia.org/wiki/Evolution_of_sexual_reproduction#Two-fold_cost_of_sex View in LinkedIn

A marine biologist says a humpback whale saved her from a shark View in LinkedIn

Plastic bags charge set to be extended to small shops View in LinkedIn