b.Characteristic of or appropriate to this sex in humans and other animals:female hormones; female fashions. c.Consisting of members of this sex. See Usage Note atlady. 2.Of or denoting the gamete that is larger and less motile than the other corresponding gamete. Used of anisogamous organ...
The eyespotted (female) Halimeda tuna gamete has been studied under the electron microscope. It has an uncondensed nucleus showing a ribosome-studded envelope and inner (chromatin) aggregations, a rough endoplasmic reticulum and a rather large amount of free ribosomes. The single plastid is ...
the microchamber allows for the placement of oocytes in the side wells, serving as a repository for these critical cells. This initiated the application of microfluidics for gamete separation and processing, fertilization, and embryo culture to study in vitro fertilization and simulate the...
Assessment of female gamete quality in the Pacific oyster Crassostrea gigas. Invertebr. Reprod. Dev. 1999;36:73-78.RAMIREZ, M.E.V.; Le PENNEC, M.; DORANGE, G.; De VAUCHELLE, N.; NONNOTTE, G. 1999 Assessment of female gamete quality in the pacific oyster Crassostrea gigas. ...
Determinations of male and female character arise from a variety of different gamete combination patterns, all of which are the result of gender coding in sexually reproducing organisms. Figure 7: A side-by-side comparison of sex determination systems in humans, insects, and birds. Figure Detail...
In insects, such as Drosophila, these are male reproductive tissues that produce and secrete seminal fluid proteins that are transferred to the female during copulation. Purifying selection Negative selection against a deleterious or slightly deleterious mutation. Heterogametic sex The sex that produces ...
RegisterLog in Sign up with one click: Facebook Twitter Google Share on Facebook ovum (redirected fromHuman egg) Thesaurus Medical Encyclopedia o·vum (ō′vəm) n.pl.o·va(ō′və) The mature female gamete of an animal; an egg. ...
Numbers stamped in each frame indicate time (min:s) from the start of the observation. Final destinations of the pollen tube are depicted on the right-hand side of each image. Dashed lines represent the boundary of the micropyle region. Arrowheads indicate the nucleus showing the male-gamete-...
stress responses and putative signalling or messenger pathways between germline and somatic cells, and different constraints on male and female gamete formation. In plants, environmental stress leads to increased frequencies of homologous recombination, both in meiosis and mitosis, and epigenetic instability...
Sex ratio theory predicts that malaria parasites should bias gametocyte production toward female cells in single-clone infections because they will experience complete inbreeding of parasite gametes within the vector. A higher proportion of male gametocytes is favoured under conditions that reduce success...