diff --git a/pymoo/operators/crossover/nox.py b/pymoo/operators/crossover/nox.py
index 38fee1a7..7485cb43 100644
--- a/pymoo/operators/crossover/nox.py
+++ b/pymoo/operators/crossover/nox.py
@@ -1,10 +1,12 @@
+import itertools
+
 from pymoo.core.crossover import Crossover
 from pymoo.core.population import Population
 
 
 class NoCrossover(Crossover):
-    def __init__(self, *, n_parents=1, n_offsprings=1, prob=0.0, **kwargs):
-        super().__init__(n_parents, n_offsprings, prob, **kwargs)
+    def __init__(self, *, n_parents=1, prob=0.0, **kwargs):
+        super().__init__(n_parents, n_parents, prob, **kwargs)
 
     def do(self, problem, pop, *args, random_state, **kwargs):
-        return Population.create(*[random_state.choice(parents) for parents in pop])
+        return Population.create(*itertools.chain.from_iterable(pop))