Types of Reproduction Asexual Sexual
Purpose of Reproduction • To make sure a species can continue. • Definition: Reproduction is the process by which an organism produces others of its same kind, we call these offspring.
Asexual Reproduction • A new organism (sometimes more than one) is produced from one organism (parent). • The offspring will have the same hereditary material as the parent. This means they will be genetically alike. • Some plants reproduce asexually
Asexual Reproduction • For example, all offspring that is reproduced asexually from this plant will be identical genetically.
Types of Asexual Reproduction • Budding • Regeneration • Fission (Binary fission)
Budding • Process by which a new, duplicate plant or animal begins to form at the side of the parent and enlarges until an individual is created. • Very common in plants;
Regeneration • The ability to restore lost or damaged tissues, organs or limbs. • It is a common feature in invertebrates, like worms and starfish.
Fission • Also called binary fission. • Becoming two by division of the complete organism. • A type of cell division. • Cells divide through a process called mitosis.
Mitosis- aka Cell Reproduction • Chromosomes in the nucleus duplicate or make a copy of themselves so after the cell splits, each cell has the same number of chromosomes. • Mitosis produces diploid cells, cells whose chromosomes come in pairs.
Sexual Reproduction • Requires two sex cells – egg and sperm • Sex Cells are made through a process called Meiosis. • Sex cells are called haploid cells because they contain one pair of chromosomes. A single chromosome is called a chromatid. This means that sex cells have half of the number of chromosomes than your other body cells; therefore no pairs. • The egg and sperm join to form an entirely different organism since half the chromosomes come from the male (sperm) and the other half from the female (egg). • The Offspring are different from the parent organism
KEY POINT TO KNOW… • Asexual reproduction results in offspring that are genetically identical to the parent organism • Sexual reproduction results in offspring that are genetically different from the parent organisms