They are on development. A cell is totipotent if it can regenerate an entire organism. Cell differentiation typically involves DNA recombination. Question 2 Dolly was created by taking an udder cell nucleus and fusing it with an enucleated egg and then fostering further development. A gamete from a male contributes more to the zygote than the gamete from the female.
Fertilization occurs in an aqueous environment.
As gastrulation proceeds, more and more but smaller and smaller cells are produced. Neurulation preceeds gastrulation. Normal Arabidopsis flowers have four whorls of organs. Mutations in plants, in which one organ is replaced by another, are called homeotic mutations. The A, B, C genes that determine organ identity are regulated by the leafy gene.