Asexual vs. Sexual Reproduction

I Can … Define asexual reproduction Define sexual reproduction Describe the differences between sexual and asexual reproduction

I Will Read and study PowerPoint & Video Complete a Venn Diagram (asexual reproduction and sexual reproduction) Illustrate (draw pictures) fertilization, budding, sexual reproduction, and asexual reproduction (be careful!!!) Explain and describe fertilization, budding, asexual reproduction, and sexual reproduction (working with a partner/small group) Write a paragraph (at least 5 sentences) explaining how offspring from sexual reproduction have more genetic differences than offspring from asexual reproduction

Sexual Reproduction Sexual Reproduction 1. 2 parents 2. Sex cells: sperm and egg 3. Sperm and egg join= fertilization 4. Offspring look different from parent (mixed DNA)

Sexual Reproduction Sexual Reproduction 5. Examples Humans, some plants, mammals, fish, reptiles, etc.

Sexual Reproduction Fertilization: part of the process of sexual reproduction in which a male reproductive cell and a female reproductive cell combine to form a new cell that can develop into a new organism.

Advantages: Sexual Reproduction Diverse offspring: genetic variation among offspring Half of the DNA comes from mom Half of the DNA comes from dad Due to genetic variation, individuals within a population have slight differences Plants – resist diseases Traits can develop to resist harsh environments that allows an organism survive

Asexual Reproduction Asexual Reproduction 1. One parent 2. No sex cells 3. Offspring produced by cell division 4. Offspring identical to parent (same DNA) 5. Several types in plants and animals

Types of Asexual Reproduction Binary Fission 1. Organism divides in half 2. 2 identical daughter cells produced 3. Daughter cells are half the parent’s size 4. Daughter cells grow, then divide too 5. In bacteria

Fission: Asexual Reproduction Fission: Cell division in prokaryotes that forms two genetically identical cells DNA is copied The cell begins to grow longer, pulling the two copies apart The cell membrane pinches inward in the middle of the cell Cell splits to form two new uniform, identical offspring Examples: bacteria, Ecoli, pond critters

Types of Asexual Reproduction Budding 1. Small bud grows out of parent cell 2. Two different sized cells made (with identical DNA) 3. Bud breaks off and grows 4. In yeast and hydra

Types of Asexual Reproduction Regeneration 1. Repair/ grow lost body parts 2. Left over cells divide to make more cells 3. Lobsters, starfish, lizards

The numbers The cells created from mitosis are diploid or 2n. The cells created from meiosis are haploid or n Definitions: Diploid (2n) – two of each type of chromosome (in homologous pair – carry the same trait) Haploid (n) – one of each type of chromosome

Mitosis Meiosis Parent cell Parent cell Diploid (2n) Diploid (2n) Daughter cell Parent cell Diploid (2n) 1st division 2nd division Daughter cell Haploid (n)

Mitosis Meiosis Meiosis

One last thing… [the] where? Mitosis occurs in normal body cells (i.e. skin cells), and meiosis occurs in sex cells (i.e. sperm and egg) only.

What type of reproduction is this??? Explain…

What type of reproduction is this??? Explain…

What type of reproduction is this??? Explain…

What type of reproduction is this??? Explain…

What type of reproduction is this??? Explain…

What type of reproduction is this??? Explain…

What type of reproduction is this??? Explain…

What type of reproduction is this??? Explain…

What type of reproduction is this??? Explain…

What type of reproduction is this??? Explain…

What type of reproduction is this??? Explain…

What type of reproduction is this??? Explain…

What type of reproduction is this??? Explain…

Asexual vs. Sexual

Video Please note: there are a limited number of headsets available in the classroom so you will need to be patient. If headphones are not available when you are, continue working on other parts of the assignment …be sure and sign the headphone sign up sheet to keep your place in line.