Cell Reproduction

Cell Reproduction – Gamete Production 4.6 Meiosis is necessary for ________ reproduction because it allows organisms to make sex cells or _______. sexual gametes

Spermatogenesis The process in which sperm cells are made is called _________________. ___ sperm cells, all the same size, result from each cell that starts meiosis. Spermatogenesis 4

Oogenesis The process in which egg cells are made is called ____________. ___ large egg cell results from each cell that starts meiosis. 3 smaller cells die  oogenesis 1

Sexual Reproduction Reproduction Video Sexual reproduction occurs when a sperm cell unites with an egg cell in a process called ______________. The fertilized egg cell is called a _________. It has the _________ (2n) number of chromosomes because ½ come from the _________ (n) and ½ come from the _____(n). fertilization zygote diploid mother father Reproduction Video

Chromosomal Conditions _______________ is when the chromosomes do not separate properly during meiosis. This causes the gametes to have an _________ number of chromosomes. Nondisjunction Animation Nondisjunction abnormal

Chromosomal conditions con’t When 3 copies of the same chromosome are found in a cell, it is called _________. When only 1 copy of a chromosome is found in a cell, it is called ___________. Offspring that receive an abnormal number of chromosomes usually: trisomy Abnormal Karyotypes monosomy Die or do not develop properly