Reproduction

Viral Reproduction

Viruses

Prokaryotic Reproduction

Bacterial Fission

Eukaryotic Reproduction

Chromosome Structure

Mitotic Figures - Allium Allium Root Meristem - A Region of Cell Division

Three kinds of eukaryotic cell reproduction

Eukaryotic Life Cycles

Cell Cycle

Chromosome StructureMonads and Dyads

Dyad Chromosomes

Ploidy and Chromosome Structure

Mitosis

Mitosis

A Metaphase Spindle

Mitotic Phases - Plant

Sexual ReproductionMeiosis and Syngamy

Eukaryotic Life Cycle

Meiosis

Meiosis

Meiosis I Bivalent

2 paired homologues(4 chromatids)

5 cross-overs

Why Did Meiosis Evolve?

Crossing-over Requires Multiple Heterozygosity

Syngamy Produces Heterozygosity Required for Meiosis to Function

Spindle Connections inCell Divisions

Syngamy SEM

Syngamy (Fertilization)Fusion of an Egg and a Sperm

Sperm, Egg, and Zygote