| inversion of chromosomes | A chromosome aberration resulting from a double break in a segment of the chromosome, with end for end rotation of the fragment between the fracture lines, and refusion of the fragments; this results in reversal of the order of genes in that segment. (05 Mar 2000) |
|---|---|
| inversion of the uterus | A turning of the uterus inside out, usually following childbirth. (05 Mar 2000) |
| inversion recovery | A magnetic resonance pulse sequence in which a series of 180 |
| uterine inversion | A turning of the uterus inside out, whereby the fundus is forced through the cervix and protrudes into or outside of the vagina. (12 Dec 1998) |
| pili, sex | Filamentous or elongated proteinaceous structures which extend from the cell surface in gram-negative bacteria that contain certain types of conjugative plasmid. These pili are the organs associated with genetic transfer and have essential roles in conjugation. Normally, only one or a few pili occur on a given donor cell. this preferred use of "pili" refers to the sexual appendage, to be distinguished from bacterial fimbriae (fimbriae, bacterial), also known as common pili, which are usually concerned with adhesion. (12 Dec 1998) |
| primary sex characters | The sex glands, testes or ovaries, and the accessory sex organs. (05 Mar 2000) |
| safe sex | Sexual practices that limit the risk of transmitting or acquiring an infectious disease via exchanges of semen, blood, and other bodily fluids, e.g., use of a condom, mutual masturbation, and avoidance of anal intercourse. (05 Mar 2000) |
| heterogametic sex | <biology> The gender which has two different sex chromosomes. For example: In humans, the male is heterogametic because he is XY (has an X chromosome and a Y chromosome). In birds, the female is heterogametic because she is WZ (has a W chromosome and a Z chromosome). Compare: homogametic sex. (09 Oct 1997) |
| secondary sex characters | Those character's peculiar to the male or female that develop at puberty, e.g., the beard of men and the breasts of women. (05 Mar 2000) |
| homogametic sex | <genetics> The gender which has two copies of the same sex chromosome. For example: In humans, the female is homogametic because she is XX (has two copies of the X chromosome). In birds, the male is homogametic because he is ZZ (has two copies of the Z chromosome). Compare: heterogametic sex. (09 Oct 1997) |
| sex | 1. The distinguishing peculiarity of male or female in both animals and plants; the physical difference between male and female; the assemblage of properties or qualities by which male is distinguished from female. 2. One of the two divisions of organic beings formed on the distinction of male and female. 3. <botany> The capability in plants of fertilizing or of being fertilized; as, staminate and pistillate flowers are of opposite sexes. One of the groups founded on this distinction. The sex, the female sex; women, in general. Origin: L. Sexus: cf. F. Sexe. Source: Websters Dictionary (01 Mar 1998) |
| sex attractants | Pheromones that elicit sexual attraction or mating behaviour usually in members of the opposite sex in the same species. (12 Dec 1998) |
| sex behaviour | Sexual activities of humans. (12 Dec 1998) |
| sex behaviour, animal | Sexual activities of animals. (12 Dec 1998) |
| sex cell | A spermatozoon or an ovum. Synonym: germ cell. (05 Mar 2000) |