Science.7
Chromosome Creature / Name ______
Date ______
Essential Questions
  1. What type of reproduction results in the greatest diversity of offspring?
/ Vocabulary
chromosome, sexual reproduction, asexual reproduction / Objectives
  1. Student will identify which type of reproduction has the greatest diversity of offspring.

Today, you are going to create two creatures and their offspring using the principles of asexual and sexual reproduction. Remember that the offspring that are created using asexual reproduction are genetically identical to the parent and offspring created by sexual reproduction are not.

Creature “A”

  1. Creature A has the following traits

Small feet

Small eyes

Long mouth

Long ears

  1. You will be using a pipe cleaner to represent the chromosome containing the traits for creature “A”.

How to make a model chromosome:

a.)On each strip of paper write one of the observable traits. (each slip should have a different trait)

b.)On the back of one strip label it creature “A”.

c.)Make a circle with the strips and place them on the pipe cleaner.

d.)Bend ends to keep the strips on.

  1. Using the parts provided by your teacher create creature “A”.

Creature “B”

  1. Creature “B” has the following traits.

Long feet

Long eyes

Small mouth

Small ears

  1. Make a model chromosome using the instructions from # 2 for creature “B”.
  1. Using the parts provided by your teacher create creature “B”.
  1. Based on what you have learned, what would the traits be from the offspring of creature “A” created by asexual reproduction?

______feet

______eyes

______mouth

______ears

  1. Create Creature “A’s” offspring using the parts provided by your teacher. Place the creature on the poster provided by your teacher for the class labeled “ Asexual Reproduction”.
  1. Sexual reproduction requires 2 parents. What could be the traits of an offspring from creature “A” and creature “B”? (You may choose a trait that either parent has to be the trait for the off spring.)

______feet

______eyes

______mouth

______ears

10. Create the offspring using the parts provided by your teacher. Then place the creature on the poster for your class labeled “Sexual Reproduction”.

Questions:

1.Sexual reproduction requires how many parents?

______

2.Asexual reproduction requires how many parents?

______

3.How does the offspring of asexual reproduction compare to the offspring of sexual reproduction?

______
______

4.Which creature has more diverse traits? Explain why.

______
______