J JLJP New member Jun 15, 2009 #1 1)crossing-over is the exchange of reciprocal segment of NA between homologous chromosomes 2)meiosis produces four nuclei that have a different chromosomes number from the original segments
1)crossing-over is the exchange of reciprocal segment of NA between homologous chromosomes 2)meiosis produces four nuclei that have a different chromosomes number from the original segments
