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diff --git a/src/main/java/org/apache/commons/math/genetics/BinaryChromosome.java b/src/main/java/org/apache/commons/math/genetics/BinaryChromosome.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.math.genetics;
+
+import java.util.ArrayList;
+import java.util.List;
+
+
+/**
+ * Chromosome represented by a vector of 0s and 1s.
+ *
+ * @version $Revision: 811685 $ $Date: 2009-09-05 19:36:48 +0200 (sam. 05 sept. 2009) $
+ * @since 2.0
+ */
+public abstract class BinaryChromosome extends AbstractListChromosome<Integer> {
+
+    /**
+     * Constructor.
+     * @param representation list of {0,1} values representing the chromosome
+     */
+    public BinaryChromosome(List<Integer> representation) {
+        super(representation);
+    }
+
+    /**
+     * Constructor.
+     * @param representation array of {0,1} values representing the chromosome
+     */
+    public BinaryChromosome(Integer[] representation) {
+        super(representation);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    protected void checkValidity(List<Integer> chromosomeRepresentation) throws InvalidRepresentationException {
+        for (int i : chromosomeRepresentation) {
+            if (i < 0 || i >1)
+                throw new InvalidRepresentationException("Elements can be only 0 or 1.");
+        }
+    }
+
+    /**
+     * Returns a representation of a random binary array of length <code>length</code>.
+     * @param length length of the array
+     * @return a random binary array of length <code>length</code>
+     */
+    public static List<Integer> randomBinaryRepresentation(int length) {
+        // random binary list
+        List<Integer> rList= new ArrayList<Integer> (length);
+        for (int j=0; j<length; j++) {
+            rList.add(GeneticAlgorithm.getRandomGenerator().nextInt(2));
+        }
+        return rList;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    protected boolean isSame(Chromosome another) {
+        // type check
+        if (! (another instanceof BinaryChromosome))
+            return false;
+        BinaryChromosome anotherBc = (BinaryChromosome) another;
+        // size check
+        if (getLength() != anotherBc.getLength())
+            return false;
+
+        for (int i=0; i< getRepresentation().size(); i++) {
+            if (!(getRepresentation().get(i).equals(anotherBc.getRepresentation().get(i))))
+                return false;
+        }
+        // all is ok
+        return true;
+    }
+}