Download At fertilization the genetic traits of an individual are determined

SCIENCE 9
NAME: ______________
~~Bunny Babies LAB PART A~~
DATE:_______________
CLASS: 90__
At fertilization the genetic traits of an individual are determined. Fertilization
occurs when gametes, an egg and a sperm, join together. Each of the cells
contributes a set of traits to the offspring.
The task: In this activity you will use coins to represent the egg and sperm. The parents are
heterozygous for each of the possible traits for our bunny baby. You will flip the coins to
determine which trait your bunny baby will inherit. You will then draw a model of your bunny
baby.
Procedure:
1. Decide which coin will represent the Female gamete and which coin will represent the
Male gamete.
2. For each of the following traits, flip each coin one time. Record “H” for heads and “h”
for tails. This will determine the genotype of your Bunny Baby.
3. Record the Phenotype for each of the traits on your Trait Sheet.
4. Use your phenotypes to put together a model of your Bunny Baby.
Bunny Baby Phenotypes:
Trait
HH
Hh
Hh
Head Shape
Pointed end of egg
Pointed end of egg
Pointed end of egg up
down
down
Ear Color
Green
Red
Yellow
Ear Shape
Ears pointed at the
Ears pointed at the
Ears rounded at the
top
top
top
Long (5 cm of more)
Medium (more than 3
Short (less than 3
and less than 5 cm)
cm)
Ear size
Eye Color
Brown
Brown
Pink
Nose Shape
Upside down triangle
Upside down triangle
Oval on Side
Mouth Shape
Smile
Smile
Frown
Whiskers
Straight
Straight
Curly
Sex
Female, Hair Bow
Male, Bow tie
Trait Sheet #1
Record your Bunny Baby genotype and phenotype using this chart.
Trait
Female
Head Shape
Ear Color
Ear Shape
Ear Size
Eye Color
Nose Shape
Mouth Shape
Whiskers
Sex (only flip male coin)
H
Male
Phenotype
You have just produced a bunny baby!
Now do it again! Create a second baby bunny by using the second trait table provided on the
reverse of this page. After you do this, answer the following questions:
Now that you have created two offspring answer the following questions.
1. Did you simulate sexual or asexual reproduction? Explain.
_________________________________________________________________
_______________________________________________
2. What sex offspring did you produce? How do you know?
_________________________________________________________________
_______________________________________________
3. Do the siblings (brothers/sisters) look similar? Explain.
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4. Are your bunnies twins? Explain why or why not?
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5. What would the parents look like? Draw a sketch of the mother or father or her/his
traits. Keep in mind that the parents’ genotypes are heterozygous (Hh) for each trait!
Sketch of mother or father
List of traits for mother or
father
Trait Sheet
Record your Bunny Baby genotype and phenotype using this chart.
Trait
Female
Head Shape
Ear Color
Ear Shape
Ear Size
Eye Color
Nose Shape
Mouth Shape
Whiskers
Sex (only flip male coin)
H
Male
Phenotype
Sketch your Bunny Babies Below:
Bunny Baby #1
Bunny Baby #2
1
Distinguish between sexual and
asexual reproduction in
representative organisms (305-2)
Select and integrate genetics
information from various sources
and apply criteria for evaluating
evidence and sources of
information. (209-5, 210-8)
1+
2
2+
3
3+
4