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Nucleus
organelle that controls all activities of a cell and contains hereditary material made of proteins and DNA
Mitosis
cell process in which the nucleus divides to form two nuclei identical to each other, and identical to the original nucleus, in a series of steps (prophase, metaphase, anaphase, and telophase).
Chromosome
structure in a cell’s nucleus that contains hereditary material.
Asexual reproduction
a type of reproduction fission, budding, and regeneration in which a new organism is produced from one organism and has DNA identical to the parent organism.
Organism
any living thing; uses energy, is made of cells, reproduces, responds, grows, and develops
Sexual reproduction
a type of reproduction in which two sex cells, usually an egg and a sperm, join to form a zygote, which will develop into a new organism with unique identity
Sperm
haploid sex cell formed in the male reproductive organs
Egg
haploid sex cell formed in the female reproductive organs
Fertilization
in sexual reproduction, the joining of a sperm and egg
Zygote
new diploid cell formed when a sperm fertilizes an egg; will divide by mitosis and develop into a new organism