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=== Gametische meiose en diplofasische cyclus ===
De andere mogelijkheid is dat de diploïde zygote zich door gewone celdeling (mitose) ontwikkelt tot een eveneens diploïde gametofyt, die de gameten vormt na een reductiedeling (meiose). Men spreekt dan van gametische meiose en van een diplofasische cyclus.
{{Levenscyclus monogenetisch met gametische meiose}}
{|class="toccolours" cellspacing="0" width=100% style="text-align:center;font-size:90%;"
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!colspan=18|Generatiewisseling: Monogenetische cyclus<br>Kernfasewisseling: diplofasische cyclus met gametische meiose
|-style="background-color:#EEEEEE;"
|colspan=18 style="text-align:left;"|{{aut|eenhuizige [[diplont]]}}
|-
|rowspan=2|→
|rowspan=2 style="background-color:Lightcyan;border-bottom:double windowtext 2.5pt;border-right:double windowtext 2.5pt;border-top:double windowtext 2.5pt;border-left:double windowtext 2.5pt;"|zygote<br>(2n)
|rowspan=2 colspan=11|→ {groei} →
|rowspan=2 style="background-color:Lightcyan;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;border-top:solid windowtext 1.0pt;border-left:solid windowtext 1.0pt;"|gametofyt<br>(2n)
|style="background-color:Lightcyan;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;border-top:solid windowtext 1.0pt;"|♂ gametangium
|→ {meiose} →
|style="background-color:Pink;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;border-top:solid windowtext 1.0pt;border-left:solid windowtext 1.0pt;"|♂ gameet (n)
|rowspan=2| > {bevruchting} →
|-
|style="background-color:Lightcyan;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;"|♀ gametangium
|→ {meiose} →
|style="background-color:Pink;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;border-left:solid windowtext 1.0pt;"|♀ gameet (n)
|-style="background-color:#EEEEEE;"
|colspan=18 style="text-align:left;"|{{aut|tweehuizige diplont}}
|-
|→
|style="background-color:Lightcyan;border-bottom:double windowtext 2.5pt;border-right:double windowtext 2.5pt;border-top:double windowtext 2.5pt;border-left:double windowtext 2.5pt;"|♂ zygote
|colspan=11|→ {groei} →
|style="background-color:Lightcyan;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;border-top:solid windowtext 1.0pt;border-left:solid windowtext 1.0pt;"|♂ gametofyt (2n)
|style="background-color:Lightcyan;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;border-top:solid windowtext 1.0pt;"|♂ gametangium
|→ {meiose} →
|style="background-color:Pink;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;border-top:solid windowtext 1.0pt;border-left:solid windowtext 1.0pt;"|♂ gameet (n)
|rowspan=2| > {bevruchting} → <
|-
|→
|style="background-color:Lightcyan;border-bottom:double windowtext 2.5pt;border-right:double windowtext 2.5pt;border-top:double windowtext 2.5pt;border-left:double windowtext 2.5pt;"|♀ zygote
|colspan=11|→ {groei} →
|style="background-color:Lightcyan;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;border-left:solid windowtext 1.0pt;border-top:solid windowtext 1.0pt;"|♀ gametofyt (2n)
|style="background-color:Lightcyan;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;border-top:solid windowtext 1.0pt;"|♀ gametangium
|→ {meiose} →
|style="background-color:Pink;border-bottom:solid windowtext 1.0pt;border-right:solid windowtext 1.0pt;border-left:solid windowtext 1.0pt;border-top:solid windowtext 1.0pt;"|♀ gameet (n)
|-style="background-color:#EEEEEE;"
|colspan=18| <!-- border-top:solid windowtext 1.0pt; -->
|}
Dit type cyclus komt voor bij verschillende [[algen]]groepen (''Heterokontophyta'', ''Chlorophyta''), en [[schimmels]] (''[[Waterschimmels|Oomycota]]'' en ''[[Ascomyceten|Ascomycota]]'').
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