zygote is the single cell from where life begins in all sexually reproducing organisms.
zygote is the single cell from where life begins in all sexually reproducing organisms.
name the single cell from where life begins in all sexually reproducing organisms?
zygote
for simple unicellular microorganisms such as the amoeba, one cell division is equivalent to reproduction – an entire new organism is created. on a larger scale, mitotic cell division can create progeny from multicellular organisms, such as plants that grow from cuttings. mitotic cell division enables sexually reproducing organisms to develop from the one-celled zygote, which itself was produced by meiotic cell division from gametes. after growth, cell division by mitosis allows for continual construction and repair of the organism. the human body experiences about 10 quadrillion cell divisions in a lifetime.
cell division
the duplication and transmission of genetic material from one generation of cells to the next is the basis for molecular inheritance, and the link between the classical and molecular pictures of genes. organisms inherit the characteristics of their parents because the cells of the offspring contain copies of the genes in their parents' cells. in asexually reproducing organisms, the offspring will be a genetic copy or clone of the parent organism. in sexually reproducing organisms, a specialized form of cell division called meiosis produces cells called gametes or germ cells that are haploid, or contain only one copy of each gene. the gametes produced by females are called eggs or ova, and those produced by males are called sperm. two gametes fuse to form a diploid fertilized egg, a single cell that has two sets of genes, with one copy of each gene from the mother and one from the father.
gene