structures in the nucleus that contain hereditary material
coded instructions that control cell activity
the joining of an egg and a sperm
segment of DNA controlling production of one protein
nuclear division that forms sex cells
formation of two nuclei with identical chromosomes
any permanent change in genetic material of a cell
a nucleic acid which carries the code for making proteins from the nucleus to the ribosomes
reproduction in which a new organism is produced when sex cells combine
cell that forms in fertilization
Most of the life of any cell is spent in a period of cell growth and development called______________.
Each human skin cell has _______pairs of chromosomes.
All of the following are composed to body cells except (bone, kidney, liver, sperm).
Human sex cells have ____________individual chromosomes.
In sexual reproduction, a new organism is produced when _________.
sex cells combine
By _____________, a new organism can grow from just a part of the parent organism.
In _____________, a new organism grows from the body of the parent organism.
The number of chromosomes in a sex cell of an organism is its ___________ chromosome number.
Meiosis consists of ____division(s) of the nucleus.
At the end of meiosis, _______cells have been produced from one cell.
Proteins are made of units called ________, which are linked together in a specific order.
The code for making proteins is carried to the ribosomes by ________.
In DNA, adenine always pairs with ____________.
Type of reproduction used to make body cells?
Type of reproduction used to make sex cells?
Type of reproduction that produces new cells with each having half as many chromosomes as the original cell?
Type of reproduction that occurs in both plants and animals?
Type of reproducion that has eight steps in cell division?
Type of reproduction that has four steps in cell division?