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PRIMA 2014 REPRODUCTION Výukový materiál GE 02 - 37 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
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asexual reproduction by: yeast > sprouting protozoa > division plants > vegetative cnidarians > jellyfish tunicates > sprouting ASEXUAL REPRODUCTION
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special asexual reproduction in arthropods and vertebrates: fertilized egg cell divides into two or more parts new individual develops of each part separately monozygotic twins: rarer than fraternal ASEXUAL REPRODUCTION
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fraternal twins: they are formed by the fertilization of two eggs each by a different sperm they might not be of the same sex two siblings of the same age different in many features TWINS
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Siamese twins: they were a popular attraction they arise if cells are completely detached from each other fusion of the body is in many cases accompanied by medical complications, e.g. interconnection of blood circulation TWINS
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ORIGIN OF TWINS
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Siamese twins – fused foeti SIAMESE TWINS
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heredity and IQ: a number of studies have been based on monitoring of twins it was showed that the heritability of intelligence is not small the heritability of intelligence is estimated between 60 – 80 % only about 20 – 40% is a result of upbringing and education IQ
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Describe the picture Which twins are identical? WORKSHEET
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KOČÁREK, Eduard. Genetika: obecná genetika a cytogenetika, molekulární biologie, biotechnologie, genomika. 2. vyd. Praha: Scientia, 2008, 211 s. ISBN 978- 80-86960-36-4. DOBRORUKA, Luděk J. Přírodopis. 2. vyd. Praha: Scientia, 1999, 127 s. ISBN 80-718-3168-9 SOURCES
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