Genomic Equivalence a. Differentiated plant cells have been shown to be totipotent. In animals, each cell retains only those genes that it needs according to its fate. All spermatozoa produced by a given mammalian male are genetically equivalent. Mesoderm Induction in Amphibians a.
Animal cells induce their vegetal neighbors to form mesoderm.
Dorsal vegetal blastomeres induces neighboring equatorial cells to form notochord. Dorsal equatorial cells induce their lateral neighbors to form intermediate mesoderm. Mammalian Gametogenesis Outline four differences between spermatogenesis and oogenesis in mammals. Relate each difference to the overall functions of egg and sperm. Slow Block to Polyspermy A. Outline briefly the process of cortical reaction and explain in an overall way why the cortical reaction is called a slow block to polyspermy.