Cell Reproduction Cell Reproduction Gamete Production 4 6

Cell Reproduction

Cell Reproduction – Gamete Production 4. 6 sexual • Meiosis is necessary for ____ reproduction because it allows organisms gametes to make sex cells or _______.

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

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

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

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

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