Sporadic sexual reproduction: Sex to some degree

Sexual Reproduction and the Evolution of Sex

People typically employ several arguments in their efforts to explain the prevalence of sexual reproduction. One such argument is that organisms engage in sex because it is pleasurable. However, from an evolutionary perspective, this explanation arrived only moments ago. The first eukaryotes to engage in sex were single-celled protists that appeared approximately 2 billion years ago, over 1.3 b...

Weird sex: the underappreciated diversity of sexual reproduction.

Some Peculiar Properties of a Particle System with Sexual Reproduction

The purpose of this paper is to describe a two dimensional growth model with sexual reproduction (i.e. two particles are needed to produce a new one) and contrast its properties with those of a similar model with asexual reproduction (i.e. an additive process in the sense of Harris (1978) and Griffeath (1979)). The results reported here were obtained in collaboration with Larry Gray. Detailed p...

Study on sexual reproduction and some morphological and pathological traits of Ophiognomonia leptostyla in Iran

Walnut anthracnose caused by Ophiognomonia leptostyla is the most important and prevalent fungal disease in most walnut growing areas in Iran. Seventy-five isolates of Ophiognomonia leptostyla, causing walnut anthracnose, were obtained from Juglans regia from various regions of Iran. In order to study the sexual reproduction of the fungus, the isolates collected from various parts of Iran were ...

Effects of Sexual Reproduction

Example 5.5: Near-critical binary splitting. The theorem applies to binary splitting where the probability of division is p(z) = 1/2+1/(2z), and q(z) = 1− p(z) is the probability of no children, if population size is z. Thus, m(z) = 1 + 1/z and the process is supercritical, but approaches criticality as z increases. The probability generating function of the offspring number is fz(s) = q(z) + p...