At the beginning of normal meiosis, a homologous chromosome pair (called a bivalent, made up of a chromosome from the mother and a chromosome from the father) intertwine unn son with a new combination of genes that differs from the combination supplied by the parents.
A homologous chromosome pair (called a bivalent) intertwine unn son with a new combination of genes. This is at the beginning of normal meiosis. These genes differs from the combination. This combination is supplied by the parents. A bivalent is made up of a chromosome from the mother from the father. A bivalent is made up of a chromosome from a chromosome from the father.