Mitosis/Meiosis LT 2-Meiosis

Homologous

One set of chromosomes come from the mother and the other set comes from the father

Diploid

Having two sets of homologous chromosomes

Haploid

Having only one set of chromosomes

Meiosis

When the number of chromosomes are cut in half to make sex cells that are haploid

Crossing Over

Homologous chromosomes exchange pieces of genetic information

Tetrad

Four chromatids paired together during prophase I

Gametes

Sex cells: egg and sperm

Zygote

A fertilized egg

Nondisjunction

When homologous chromosomes are not properly separated in meiosis resulting in the incorrect number of chromosomes in the gametes

sexual reproduction

A reproductive process that involves two parents that combine their genetic material to produce a new organism, which differs from both parents