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Colorado AgriScience Plant Science Unit 4: Plant Reproduction & Genetics Lesson 1: Introduction to Plant Reproduction Plant Propagation • Both are increasing the number of a species • Two types of Plant Propagation – 1) Sexual Reproduction – 2) Asexual Propagation Sexual Reproduction • The union of the female and male sex cells to produce a seed or embryo – Ovum: Female sex cell – Pollen: Male sex cell – Embryo (seed germ): immature plantlet • Sexual Reproduction results in the creation of a genetically new individual!! Asexual (Vegetative) Reproduction • Production of a plant w/o uniting pollen & ovum • Known as plant cloning • Leaves, stem, or roots may be used to grow a new plant • Occurs naturally and artificially • Produces a genetically identical plant Two Different Types of Seeds • 1) Monocot – Generally from the grass family • 2) Dicot – Generally broad leaf plants Monocots • Seeds w/ 1 seed leaf • 1 solid seed • Leaves have parallel • • veins Roots are advantageous Examples – Corn, wheat, barley, oats Dicots • Seeds w/ 2 seed • • leaves or cotyledons Veins are webbed Examples – Beans, potatoes, sugar beats, sunflowers Types of Flowers • 2 Types – 1) Perfect Flower – 2) Imperfect Flower Types of Flowers Cont. • To the Left is a • complete or perfect flower An incomplete or imperfect flower is missing one or more of the labeled parts Pollination • Transfer of pollen • from the anther to the stigma of a flower of the same species May be accomplished by wind, gravity, bees, or manually Fertilization & Germination • Fertilization – The union of pollen & ovum • Germination – The sprouting of a seed