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Unformatted text preview: not c hange the ploidy lev el; fertiliz ation inc reas es the ploidy lev el from n to 2n.
Neither meios is nor fertiliz ation c hanges the ploidy lev el.
Meios is dec reas es the ploidy lev el from 2n to n; fertiliz ation inc reas es the ploidy lev el from n to 2n. ANSWER: Correct
Meios is c reates gametes (eggs and s perm) with only a s ingle c hromos ome s et (haploid orn) from parental c ells with two c hromos ome s ets (diploid or
2n). During fertiliz ation, the haploid s perm (n) and egg (n) fus e, produc ing a diploid z y gote (2n). The c ells of the z y gote then div ide by mitos is (whic h
does not c hange the ploidy lev el) to produc e an adult organis m (s till 2n) of the nex t generation.
In s ex ual life c y c les , meios is and fertiliz ation k eep the number of c hromos omes c ons tant from generation to generation. Meiosis (2 of 3): The Mechanism (BioFlix tutorial)
Meios is is mec hanis tic ally s imilar
to mitos is in many way s , although
it inv olv es two s equential nuc lear
and c ellular div...
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- Spring '14