SexualReproduction

My GoalsToday I will learn how living

organisms reproduce and pass traits to their

offspring.

What is heredity?

Heredity is the passing on of traits from one generation to the next.

What are the two modes of reproduction?

Sexual Reproduction

and

Asexual Reproduction

How do eukaryotic cells reproduce?

Sexually

How do prokaryotic cells reproduce?

Asexually

Sexual or Asexual Reproduction?

How diverse are humans?

Create a group with students that are the same height as you.

1. If these students had the same amount of time to grow, why are

they different heights?

Sexual reproduction creates diverse offspring, or offspring containing a combination of DNA from

both parents.

Sexual Reproduction

Produces a special cell with one of each pair of genes – called an egg cell.

Female Organism

Produces a special cell with one of each pair of genes.

- sperm cell in animals - pollen in plants.

Male Organism

In animals, sperm is made in the testes of males.

Where is sperm made?

In plants, pollen is made in the stamen. BrainPOP | Science | Learn about Pollination

Where is pollen made?

Sexual Reproduction in Animals

During fertilization, egg and sperm join together. Once the egg is fertilized, it is called a zygote and will develop into a new organism.

Asexual Reproduction• The production of offspring by a single parent,

without the union of a sperm cell and an egg cell.

Asexual Reproduction

• The offspring is getting genes from only one parent so they are genetically identical to the parent.

Types of Asexual Reproduction

• Budding = a new organism grows from an existing organism and then breaks off.

• Example = hydra

Types of Asexual Reproduction• Fission = an organism splits in two to create

two new organisms.• Examples = prokaryotes

Types of Asexual Reproduction• Vegetative Propagation = smaller plants begin

to grow off of an adult plant.• Examples: grasses growing rhizomes and

stolons

Pros & Cons to Asexual Reproduction• Pros– Don’t have to waste energy finding a mate– Can easily produce many offspring

• Cons– All organisms are genetically identical– They all have the same weaknesses

What’s happening in these videos?

http://www.bing.com/videos/search?q=cell+mitosis&view=detail&mid=350203EF0FC4290C11ED350203EF0FC4290C11ED&first=41&FORM=NVPFVR

https://www.youtube.com/watch?v=9MnQxiSJZ4Q

•Discovery Ed: Meiosis http://app.discoveryeducation.com/search?Ntt=heredity

•Discovery Ed: Patterns of Inheritance http://app.discoveryeducation.com/search?Ntt=heredity