when an area of a chromatid is exchanged with the matching area on a chromatid of its homologous chromosomes occurs.

haploid

term that means the cell has only half the set of chromosomes ( human-23)

somatic

body cells

crossing over

when part of a chromosomes (gene) is exchanged by two different chromosomes.

Division # 2

The 2 cell produced from !st division will divide into 4 cells.

XY

male

testes

male gonad produces sperm

Division # 1

pairs of homologous chromosomes join by a centromere from a tertard during prophase 1- this process is called synapsis.

Oogenesis

process of producing eggs-meiosis- 1 viable eggs are produced ( 3 polar bodies are discarded)

gonacls

sex organs that produce gametes

diploid

term that means the cell has the full set of chromosomes,half from mom, half from dad.

Zigote

the fertilized egg= a single cell.

Fertilization

the uniting of the sperm and the egg.

Meiosis

Cell division in sex cells/gametes.

chromosomes

structures within the nucleus that contain DNA or hereditary information.

homologous

like in structure/ contain the same type of information

spermatogenes

process of producing sperm-meiosis-4 viable sperm are produced.

gametes

sex cells

XX

female

ovaries

female gonad produces egg (ova)