Chapter four notes

For science the one with mietosis

Nucleus

Organelle that controles all the activities if a cells and contains hereditary material made up of proteins and DNA

mitosis

cell process in which the nucleus divides to form two identical nuclei.

chromeasomes

structur in a cells nuclus that contains hereditary matiral

Asexual reproduction

a type or reproduction Fission budding and regeneration in which new organism is produced from one organism and has DNA identical to the parent orginisim.

Sexual reproduction

A type or reproduction in which two sex cells usually an egg and a sperm form to make a zygote which will develope into a new organism with a unique identity

Sperm

Haploid sex cell formed in the mail reproductive organs

Egg

Haploid sex cell formed in the female reproductive organs

Fertilization

in sexual reproduction in the joining of the sperm and egg,

Zygote

new diploid cell formed when sperm fertilizes an egg; will divide by mitoses and develop into a new organism

Diploid

Cell whose simular chromosomes occur in pairs

haploid

cell that has half the number of chromosomes as a body cell

Meiosis

reproductive procese the produces 4 haploid sex cells from one diploid cell and ensures offspring will have the same number or chromesomes as the parent orginisims

DNA

The genic matrial of all orginisims made up of two twisted strands or sugarphodphate molecule and nitrogen bases

RNA

a type of niclei acid that carries codes for makinf proteins from the neculous to the ribosomes

Gene

section of DNA on a chromosome tht contains instructure for making specific proteins

Mutation

any permanate change in a gene or a chromosome of a cell; may be benificial or harmful or have little effect on an orginisim