cell division in which the nucleus divides into nuclei containing the same number of chromosomes
process by which the number of chromosomes per cell is cut in half
A picture of all the chromosomes in a cell arranged in pairs
a structure in the nucleus that contains hereditary material and is visible to the naked eye.
deoxyribonucleic acid, the material that contains the information that determines inherited characteristics
first and longest phase of mitosis where chromatin coils into visible chromosomes
second phase of mitosis, during which the chromosomes line up across the center of the cell
the stage of meiosis or mitosis when chromosomes move toward opposite ends of the nuclear spindle
the final stage of mitosis or meiosis, during which a nuclear membrane forms around each set of new chromosomes
division of the cytoplasm or cell during cell division
Do not have a properly functioning cell-cycle system; instead, they divide excessively and can invade other tissues of the body
the process of making a copy of DNA (occurs during interphase of the cell cycle)
the period of the cell cycle during which the nucleus is not undergoing division, typically occurring between mitotic or meiotic divisions
Chromosomes that are similar in size, shape, and genetic content (one is maternal, the other is paternal)
advanced maternal age
women over age 34 (age 35 at delivery) at increased risk for a chromosome abnormality such as Down Syndrome.
the interchange of sections between pairing homologous chromosomes during the prophase of meiosis
the joining of a sperm cell and an egg cell
reproductive cells such as the sperm and the egg, have only half the number of chromosomes as body cells
Programmed cell death - which increases with advancing age (or aging)
area where the chromatids of a chromosome are attached
in animal cells, a structure that attaches to the mitotic spindle fibers during cell reproductions
one of the fiber-like structures in the cell that assists in the movement of chromosomes
Note that 4 daughter cells are made each with HALF the number of chromosomes as the original parent cell.
Note that two daughter cells are formed following cytokinesis each with the same number of chromosomes as the original parent cell.