Download Marshmallow Monsters

Marshmallow Monsters
Marshmallow Monsters are pets that require minimal care (and can be very tasty). These
rare creatures are made out of marshmallows, gumdrops and gummies. By very careful
chromosome analysis, our marshmallow genetists found that Marshmallow Monsters have six
pairs of chromosomes.
Chromosome
PHENOTYPE
GENTOTYPE
2 Antenna
AA
1 Antenna
Aa
0 Antenna
aa
3 Bumps
BB
2 Bumps
Bb
1 Bump
bb
3
Curly Tail
TT or Tt
Straight Tail
tt
4
2 Eyes
EE or Ee
1 Eye
ee
Red Eye(s)
RR
#
1
2
5
Orange
Rr
Eye(s)
Yellow Eye(s)
6
3 Body
Segments
2 Body
Segments
Mommy Marshmallow Monsters DNA:
rr
DD or Dd
dd
Daddy Marshmallow Monsters
DNA:
Aa, Bb. Tt, Ee, Rr, Dd
Aa, Bb, Tt, Ee, Rr, Dd
Procedure:
1. Choose one person in your group to be the “Mommy” coin flipper and one to be
the “Daddy” coin flipper.
2. For each chromosome flip your coin. The dominant allele is passed on in meiosis if
the coin lands heads up. The recessive allele is passed on if the coin lands tails up.
Record your results in the data table.
3. Determine the phenotypes for all six traits and record in the data table.
4. Build your baby Marshmallow Monster.
Before you eat your creature, I must check your work!!!!!
Name ____________________________
Per___
Date_____
___________________________
___________________________
Marshmallow Monsters
Data Table:
Chromosome
Alleles
Mo
m
Chromosome 1:
Antenna
(toothpicks)
Dad
Genotyp
e
Baby
Phenotype
Chromosome 2:
Bumps
(gumdrops)
Chromosome 3:
Tail
(pipecleaner)
Chromosome 4:
Number of Eyes
(gummy bears)
Chromosome 5:
Eye Color
Chromosome 6:
Body Segments
(marshmallows)
Questions:
1. Which of the Marshmallow Monster’s traits show incomplete dominance?
2. What is the diploid number of chromosomes in a Marshmallow Monster? _____________
3. What is the haploid number of chromosomes in a Marshmallow Monster? _____________
4. What heterozygous genotypes does your baby Marshmallow Monster have?
5. What homozygous dominant genotypes does your baby Marshmallow Monster have?
6. What homozygous recessive genotypes does your baby Marshmallow Monster have?
7. A Marshmallow Monster with 2 antennas is crossed with a Marshmallow Monster with
only 1 antenna. What
are the chances that an offspring will have 2 antennas? 1
antenna? 2 antenna?
Show Punnett Square.
8. A Marshmallow Monster with red eyes is crossed with a Marshmallow Monster with
yellow eyes. What are the
chances that an offspring will have red eyes? Yellow eyes?
Orange eyes?
Show Punnett Square.
9. A Marshmallow Monster with red eyes is crossed with a Marshmallow Monster with
yellow eyes. What are the
Orange eyes?
Show Punnett Square.
chances that an offspring will have red eyes? Yellow eyes?
10. A Marshmallow Monster with a curly tail is crossed with a Marshmallow Monster with
a straight tail. What
are the chances that an offspring will have a curly tail? Straight
tail?
Show Punnett Square.