Cloning October 19, 2.009

*103 Objective:

SWBAT describe the steps necessary to clone organisms

SWBAT evaluate pros and cons of cloning organisms

Catalyst: What are your feelings on cloning? It is 2050 and scientists have developed the

technology to clone humans. What is one positive consequence of this? What is one negative consequence of this?

Agenda

Catalyst Catalyst Cloning Cloning Cloning Video Cloning Video Cloning Debate Cloning Debate Exit Question Exit Question

Cloning

Key Point #1: Cloning is the process of creating a genetically identical copy of an organism by a somatic cell nuclear transfer.

Don’t copy, just look.

Sure, Mr. J. What does this look like in real life though? I'M GLAD YOU ASKED!!!!

Steps of a Somatic Cell Transfer 1) A nucleus is

removed from an egg 2) The nucleus is

removed from the cell that needs to be cloned

3) The nucleus from the cell that needs to be cloned is put into the empty egg.

4) It is given a jolt of electricity, causing it to divide and grow.

Species that have been successfully cloned to date Tadpole: (1952) Carp: (1963) Sheep: (1996)- FIRST ADULT ANIMAL TO BE

CLONED. REMEMBER THIS!! Rhesus Monkey: (2007) Cattle: (2005) Cat: (2002) Mule: (2003) Horse: (2005) Human: ????

Implications of cloning

In 2007, scientists cloned a rhesus monkey embryo and harvested monkey stem cells.

This is a large step in science! Humans are primates, as well. This could have PROFOUND effects.

2 minutes- Think-Pair-Share. If we could clone humans, what would that mean for our society?

Cloning

Key Point #2: Cloning embryos may be useful to harvest

stem cells for research!

After cloning an organism, we can dissect that embryo to remove stem cells.

Stem Cell Video

Expectations: You should be able to answer these questions on

the worksheet. Keep your head up and pay attention during this

movie. What are we trying to do with cloned human cells? What are the potential benefits? What are the ethical issues?

WHOA! A LOT TO THINK ABOUT.

Worksheet

Independent work time on the worksheet

Prompt #1

People should be able to destroy embryos to improve the life of already living humans.

Prompt #2

Cloning’s positive benefits outweigh the negative consequences.

Prompt #3

Since a blastocyst is as big as the tip of a pin, it should not be considered to be a human life.

Prompt #4

Cloning is unnatural and should not be pursued.

Exit Question

Describe the four steps necessary to clone an organism.