Search results
Results From The WOW.Com Content Network
Isogamy is a form of sexual reproduction that involves gametes of the same morphology (indistinguishable in shape and size), and is found in most unicellular eukaryotes. [1] Because both gametes look alike, they generally cannot be classified as male or female . [ 2 ]
Differentiation of the gametes. Both gametes the same (isogamy). Like other species of Cladophora, C. callicoma has flagellated gametes which are identical in appearance and ability to move. [20] Gametes of two distinct sizes (anisogamy). Both of similar motility. Species of Ulva, the sea lettuce, have gametes which all have two flagella and so ...
Isogamy (Ancient Greek ισο - iso= "equal + γάμος gámos = "marriage") – in cell biology – is a type of sexual reproduction that includes gametes of similar morphological similar shape and size, with difference in general only in genome content and gene expression in one or more mating-type regions.
Gametes of both mating individuals can be the same size and shape, a condition known as isogamy. By contrast, in the majority of species, the gametes are of different sizes, a condition known as anisogamy or heterogamy that applies to humans and other mammals. The human ovum has approximately 100,000 times the volume of a single human sperm cell.
Anisogamy (the opposite of isogamy) comes from the ancient Greek negative prefix a(n)-(alpha privative), the Greek adjective isos (meaning equal) and the Greek verb gameo (meaning to have sex/to reproduce), eventually meaning "non-equal reproduction" obviously referring to the enormous differences between male and female gametes in size and abilities. [10]
In isogamous species, the gametes are similar or identical in form , but may have separable properties and then may be given other different names (see isogamy). [10] Because both gametes look alike, they generally cannot be classified as male or female. For example, in the green alga, Chlamydomonas reinhardtii, there are so-called "plus" and ...
Homologous chromosomes contain highly similar but not identical information, and by exchanging similar but not identical regions, genetic recombination increases genetic diversity among future generations. [11] During sexual reproduction, two haploid gametes combine into one diploid cell known as a zygote in a process called fertilization. The ...
Mating types are the microorganism equivalent to sex in higher organisms [1] and occur in isogamous species. [2] Depending on the group, different mating types are often referred to by numbers, letters, or simply "+" and "−" instead of "male" and "female", which refer to "sexes" or differences in size between gametes. [1]