Entry/-response 1 Cortical or zona reactions Compaction - impermeable to more sperm 2)Oocyte finishes 2nd meiotic division 3 Female/ Male pronucleus Metabolic activation of the egg Results of fertilization Diploid Genetic sex Cleavage• Entry – response 1) Cortical or zona reactions - Compaction - impermeable to more sperm 2) Oocyte finishes 2nd meiotic division 3) Female /Male pronucleus 4) Metabolic activation of the egg • Results of fertilization – Diploid – Genetic sex – Cleavage