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)