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REPRODUCTION Výukový materiál GE 02 - 35 Tvůrce: Mgr. Šárka Vopěnková Tvůrce anglické verze: ThMgr. Ing. Jiří Foller Projekt: S anglickým jazykem do dalších předmětů Registrační číslo: CZ.1.07/1.1.36/03.0005 Tento projekt je spolufinancován ESF a SR ČR PRIMA 2014 REPRODUCTION doubling of cellular components> strictly controlled and monitored nuclear mass is responsible for this process in the nucleus there are chromosomes REPRODUCTION chromosomes in the nucleus duplicate two copies of all information are prepared nucleus divides into two the number of organelles doubles both new daughter cells receive half the material of the parent cell REPRODUCTION daughter cells are identical they are similar to the maternal cell they are usually smaller repeated cell division > by the growth of an individual REPRODUCTION Simplified drawing of cell division: 1) Cell got bigger and can divide. 2) All parts of the cell including the content of the nucleus – hereditary information – double. 3) Nuclei and doubled cell parts divide spaciously. On each end of the cell there is one nucleus and about a half of cell parts 4) In the middle a new membrane arises, which separates both the parts from each other 5) Two new almost identical daughter cells star a new life. When they grow up to the correct size, they can also separate. REPRODUCTION DIVISION OF BACTERIA REPRODUCTION ways of reproduction: asexual sexual asexual reproduction: new cells are formed from one cell both parents are never needed bacteria plants fungi protozoa REPRODUCTION REPRODUCTION sexual reproduction: new individual grows by dividing cells at the beginning there are two different sex cells sex cells = gametes by fusion of gametes a zygote is formed REPRODUCTION WORKSHEET DESCRIBE THE PICTURE SOURCES DOBRORUKA, Luděk J. Přírodopis. 2. vyd. Praha: Scientia, 1999, 127 s. ISBN 80-718-3168-9.