PRIMA 2014

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

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

REPRODUCTIONSimplified 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 other5) Two new almost identical

daughter cells star a new life. When they grow up to the correct size,

they can also separate.

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

REPRODUCTION

DESCRIBE THE PICTURE

WORKSHEET

DOBRORUKA, Luděk J. Přírodopis. 2. vyd. Praha: Scientia, 1999, 127 s. ISBN 80-718-3168-9.

SOURCES