alternation of generations

الإنجليزية - التركية

تعريف alternation of generations في الإنجليزية التركية القاموس.

nesil değişimi

(Biyoloji) (genetik) nesil değişimi

الإنجليزية - الإنجليزية

تعريف alternation of generations في الإنجليزية الإنجليزية القاموس.

the alternation of two or more different forms in the life cycle of a plant or animal

The regular alternation of forms or of mode of reproduction in the life cycle of an organism, such as the alternation between diploid and haploid phases, or between sexual and asexual reproductive cycles. Also called metagenesis, xenogenesis. In biology, alternation of a sexual phase (gametophyte) and a nonsexual phase (sporophyte) in the life cycle of an organism. The two phases, or generations, are often distinct in structure and sometimes in chromosome makeup. Alternation of generations is common in algae, fungi (see fungus), mosses, ferns, and seed plants. The character and extent of the two phases vary greatly among different groups of plants and algae. During the course of evolution, the gametophyte stage has been progressively reduced. Thus in higher (vascular) plants, the sporophyte is the dominant phase; in more primitive, nonvascular plants the gametophyte is dominant. Among animals, many invertebrates (e.g., protozoans, jellyfish, flatworms) have an alternation of sexual and asexual generations

الواصلة

al·ter·na·tion of generations

التركية النطق

ôltırneyşın ıv cenıreyşınz

النطق

/ˈôltərˌnāsʜən əv ˌʤenərˈāsʜənz/ /ˈɔːltɜrˌneɪʃən əv ˌʤɛnɜrˈeɪʃənz/