Your SlideShare is downloading. ×
0
BUCKTOOTHED
BUNNIES
A Study of a Fatal Feeding Flaw:
Rabbit Tooth Malocclusion
click here to

BEGIN SHOW
Back

Poppy

to family pedigree

“The Escape Artist”

Color Genetics

•Phenotype: agouti castor
•Genotype: Aa bb Dd enen
T...
Back

Harley

to family pedigree

“The Chubby Bunny”

Color Genetics

•Phenotype: broken black
•Genotype: aa Bb Dd Enen
Te...
Back

Hazel

to family pedigree

Color Genetics

•Phenotype: agouti castor
•Genotype: Aa bb Dd enen
Teeth Genetics

•Becau...
Back

Midnight

to family pedigree

Color Genetics

•Phenotype: self color black
•Genotype:aa Bb Dd enen
Teeth Genetics

•...
Back

Apple

to family pedigree

Color Genetics

•Phenotype: broken blue
•Genotype: aa Bb dd Enen
Teeth Genetics

•Apple w...
Back

Sundance

to family pedigree

Color Genetics

•Phenotype: self color blue
•Genotype: aa Bb dd enen
Teeth Genetics

•...
Back

Rye

to family pedigree

“The True Cuddle Bunny”

Color Genetics

•Phenotype: self color blue
•Genotype: aa Bb dd en...
Back

Milo

to family pedigree

Color Genetics

•Phenotype: broken black
•Genotype: aa Bb Dd Enen
Teeth Genetics

•Milo is...
Back

Blackberry

to family pedigree

Color Genetics

•Phenotype: black
•Genotype: aa BB Dd enen
Teeth Genetics

•Blackber...
Back

Thorn

to family pedigree

Color Genetics

•Phenotype: black
•Genotype: aa Bb Dd enen
Teeth Genetics

•Thorn is unaf...
Back

Will

to family pedigree

“The Runaway”

Color Genetics

•Phenotype: self color lilac
•Genotype: aa bb dd enen
Teeth...
Back

Sundance

to family pedigree

Color Genetics

•Phenotype: broken blue
•Genotype: aa Bb dd Enen
Teeth Genetics

•Cowb...
Butch Cassidy

Back
to family pedigree

Color Genetics

•Phenotype: broken lilac
•Genotype: aa bb dd Enen
B.C. shortly aft...
The Current Dilemma
•

When she had finally given in to my constant begging, my mother never could have predicted the
incr...
Effects of Tooth Malocclusion
•With his crooked teeth, Rye has a hard time doing normal rabbit things like grooming, drink...
Using the Scientific Method
•

Before beginning the experiment, I needed to set up my information according to the scienti...
Research Step 1
Studying genetics and other influences

•

TEETH- For years, rabbits have been used by researchers and gen...
Research Step 2

Organizing my own information

•

Using my education from ninth grade biology and the internet, I began t...
Key
male
female

untested
potential carrier

Rye

Poppy

Hazel

normal

expresser

The Family Tree

known carrier

Midnigh...
Hypothesis and Explanation
•

The before stated hypothesis is supported by the pattern of inheritance show in the family t...
Conclusion
•

As I went along in my researching for other causes, I became more and more certain that tooth
malocclusion i...
Sources
•

During my research, I used the following sites and books to learn more about rabbit genetics and
tooth malocclu...
Thanks for Watching!
Upcoming SlideShare
Loading in...5
×

Bucktoothed Bunnies: Work Sample

78

Published on

Published in: Lifestyle, Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
78
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
1
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Transcript of "Bucktoothed Bunnies: Work Sample"

  1. 1. BUCKTOOTHED BUNNIES A Study of a Fatal Feeding Flaw: Rabbit Tooth Malocclusion click here to BEGIN SHOW
  2. 2. Back Poppy to family pedigree “The Escape Artist” Color Genetics •Phenotype: agouti castor •Genotype: Aa bb Dd enen Teeth Genetics •Poppy is homozygous dominant Nibbling bread on a chilly morning Cuddling with her tiny kitten, Hazel, and recovering from kindling for the recessive gene that causes tooth malocclusion; she is completely normal and all of her litters are and will be unaffected.
  3. 3. Back Harley to family pedigree “The Chubby Bunny” Color Genetics •Phenotype: broken black •Genotype: aa Bb Dd Enen Teeth Genetics •Harley is homozygous dominant Trying out her spotted camo on a rare snowy day Enjoying leftover french fries and never sharing for the recessive gene that causes tooth malocclusion; she is completely normal and all of her litters are and will be unaffected.
  4. 4. Back Hazel to family pedigree Color Genetics •Phenotype: agouti castor •Genotype: Aa bb Dd enen Teeth Genetics •Because Hazel never had a litter, I will never know if she was a heterozygous carrier or just a homozygous dominant, normaltoothed rabbit. Cuddling in the hay and trying to focus her newly opened eyes Gobbling up french fries and looking like a walrus
  5. 5. Back Midnight to family pedigree Color Genetics •Phenotype: self color black •Genotype:aa Bb Dd enen Teeth Genetics •I can never be really sure if Adventuring in the next box shortly after opening her eyes Scratching behind her ear while playing Midnight was a carrier or not because I never saw her at an old enough age. She could possibly be a carrier of the tooth malocclusion causing gene or she could be a completely unaffected normal rabbit
  6. 6. Back Apple to family pedigree Color Genetics •Phenotype: broken blue •Genotype: aa Bb dd Enen Teeth Genetics •Apple was a heterozygous carrier Eating fresh lettuce, her favorite food Trying to reach the tasty grass for tooth malocclusion; her kits can either be expressers, carriers, or normal, homozygous dominant.
  7. 7. Back Sundance to family pedigree Color Genetics •Phenotype: self color blue •Genotype: aa Bb dd enen Teeth Genetics •Sundance could have possibly Nibbling on alfalfa pellets Tasting grass for the first time been a heterozygous carrier or an unaffected homozygous dominant rabbit.
  8. 8. Back Rye to family pedigree “The True Cuddle Bunny” Color Genetics •Phenotype: self color blue •Genotype: aa Bb dd enen Snuggled up in a towel Teeth Genetics •Rye is an expresser of the recessive tooth malocclusion which means he is homozygous recessive and suffers from constantly growing crooked teeth Only 10 weeks old and exploring his new home Teeth before a checkup
  9. 9. Back Milo to family pedigree Color Genetics •Phenotype: broken black •Genotype: aa Bb Dd Enen Teeth Genetics •Milo is unaffected by tooth Hearing the lawn mower for the first time Trying to get back in the nest box malocclusion, but he has the potential to be a heterozygous carrier like his sister Apple.
  10. 10. Back Blackberry to family pedigree Color Genetics •Phenotype: black •Genotype: aa BB Dd enen Teeth Genetics •Blackberry is unaffected by tooth Tasting hay for the first time Exploring an old burrow, where he was actually born malocclusion, but he has the potential to be a heterozygous carrier like his sister Apple.
  11. 11. Back Thorn to family pedigree Color Genetics •Phenotype: black •Genotype: aa Bb Dd enen Teeth Genetics •Thorn is unaffected by tooth Tasting grass for the first time with his sister Adventuring around a new pen after being weaned malocclusion, but he has the potential to be a heterozygous carrier like his sister Apple.
  12. 12. Back Will to family pedigree “The Runaway” Color Genetics •Phenotype: self color lilac •Genotype: aa bb dd enen Teeth Genetics •Will is heterozygous for the Enjoying a tasty carrot Contemplating the world outside the nest and trying the crawl over recessive gene that causes tooth malocclusion; all of his offspring have the potential to the carriers or exhibitors or normal
  13. 13. Back Sundance to family pedigree Color Genetics •Phenotype: broken blue •Genotype: aa Bb dd Enen Teeth Genetics •Cowboy is not an expresser of the Gobbling up bread, his favorite snack Hopping around after being reintroduced to his brother, Butch Cassidy gene, but, because he has no sired any litters, it is unknown if he is a carrier or a normal, homozygous dominant rabbit.
  14. 14. Butch Cassidy Back to family pedigree Color Genetics •Phenotype: broken lilac •Genotype: aa bb dd Enen B.C. shortly after I first caught him. Teeth Genetics •Butch Cassidy was homozygous recessive meaning he was affected. His teeth seemed to be in worse condition than Rye’s even though he was younger. Trying to stay cool in the shade His teeth when I first found him
  15. 15. The Current Dilemma • When she had finally given in to my constant begging, my mother never could have predicted the incredible journey my little, fuzzy, feed-store bunny would take me on. Now, nearly 6 years later, I’m one foot taller and millions more times experienced in the world of caring, breeding, and dentistry of rabbits. Once a month, I go outside wearing gawky eye goggles, face the unpredictable Mississippi weather, and proceed to trim my pet rabbit’s crooked teeth, formally known as tooth malocclusion. The three years this monthly practice has been going on, I have wondered just what caused my rabbit’s crooked teeth, and, after several accidental litters, I came across another rabbit with malocclusion, and began to wonder just what could be causing this, and so my observational experiment began. Poppy, my very first rabbit and the mother of my first litter Rye, my first buck and the original rabbit with tooth malocclusion
  16. 16. Effects of Tooth Malocclusion •With his crooked teeth, Rye has a hard time doing normal rabbit things like grooming, drinking, or even eating. Tangles and mats form in his fur because grooming is not possible, and whenever his teeth are freshly trimmed, he vigorously washes. Because of the difficulty of chewing, Rye always chooses soft, high calorie food, and methodically grinds his treats with his back molars. Drinking out of water dishes offers a new challenge, and Rye always manages to wet his entire muzzle in the process. •To trim Rye’s quick-growing teeth, I wrap him up in a comfortable towel, wedge open his mouth with my fingers, and begin to trim down his teeth. Even though I put him through this seeming torture every month, Rye has remained the friendliest rabbit in the pen, and is always eager to be cuddled or trimmed. Before his tooth checkup After his tooth checkup
  17. 17. Using the Scientific Method • Before beginning the experiment, I needed to set up my information according to the scientific process which requires research to be conducted, a question to be asked, a hypothesis to be formed, and a conclusion to be drawn. • • • The Research is depicted on the following slides • The Conclusion will be formed after further observation study of the hypothesis The Question: What is causing malocclusion in my rabbit’s teeth? The Hypothesis: If a rabbit inherits the homozygous recessive gene from its heterozygous carrier parents, then it will be affected by tooth malocclusion.
  18. 18. Research Step 1 Studying genetics and other influences • TEETH- For years, rabbits have been used by researchers and geneticists because of their ease of • COLOR- Rabbit fur coloring is controlled by 10 or so recognized allele groups. In my study, care, short procreation, and startling chromosomal similarities to humans. As different breeds developed and led to the constantly growing pet rabbit trend, inbreeding and other genetic shortcomings spawned tooth malocclusion, causing people to wonder just how their “peter cottontail” became a tusky, grumpy tasmanian devil. Researchers began to the study the gene and have recently come up with several conflicting reasons, so I decided to make a hypothesis and test it. however, I decided to only focus on the 4 following allele sets. Gene Descriptions Dominant Allele Recessive Allele Agouti/Self Color A a Black/Brown B b Dense/Dilute D d Broken/Self Colored En en
  19. 19. Research Step 2 Organizing my own information • Using my education from ninth grade biology and the internet, I began to study my own notes and tried to decipher genetic or environmental connection in the inheritance of tooth malocclusion. I had personally raised one of the other rabbits who was an expresser of the gene, so I could rule out nutritional deficiencies as being a cause. As I began to look for other answers, I also noted that both expressers I had experienced were male, making me ponder the possibility of a sex linked trait, but then, it hit me! Tooth malocclusion followed the exact pattern that any recessive gene would follow in a family tree. • Rye, my original rabbit with tooth malocclusion, would be homozygous recessive; his kits, Apple and Will, would be heterozygous carriers. When they escaped and I found their accidental litter four weeks later, I caught two of the kits. One was completely unaffected, but the other was homozygous recessive for tooth malocclusion, confirming his sire and dam as carriers of the sometimes deadly gene. The alleles included in my recessive gene hypothesis for tooth malocclusion are pictured below. Phenotype Genotype Normal? homozygous dominant TT normal heterozygous Tt carrier homozygous recessive tt expresser
  20. 20. Key male female untested potential carrier Rye Poppy Hazel normal expresser The Family Tree known carrier Midnight CLICK ON ANY RABBIT TO GO TO A PERSONALIZED PAGE OF INFORMATION Will Butch Cassidy Harley Apple Cowboy Sundance Blackberry Thorn Milo
  21. 21. Hypothesis and Explanation • The before stated hypothesis is supported by the pattern of inheritance show in the family tree. By skipping one generation and revealing itself in the next, the gene for tooth malocclusion is very similar Mendel’s famous purple and white peas. These recessive genes, as Mendel dubbed them, can be carried for generations without appearing. • In my personal experiment, the recessive genes appeared after only 1 generation. Rye, a homozygous recessive, passed on one recessive allele to his offspring making them heterozygous carriers. When the heterozygous carriers bred, another homozygous recessive rabbit, Butch Cassidy, reveled itself.
  22. 22. Conclusion • As I went along in my researching for other causes, I became more and more certain that tooth malocclusion in rabbits in caused by a recessive gene. Several research groups have done studies supporting this hypothesis, and controlled experiments have shown that nutritional and environmental conditions have little or no affect on tooth malocclusion. Different breeds are more or less susceptible to this fatal disease, but smaller breeds such as Mini Rexes are at a much higher risk. • Learning about rabbit genetics opened my eyes to the detailed genes that combine to create a small, furry creature. With 42 chromosomes, rabbits can teach us a great deal about our own genetic history and possibly explain our dental malocclusion too.
  23. 23. Sources • During my research, I used the following sites and books to learn more about rabbit genetics and tooth malocclusion: • • • • • • • http://jorthod.maneyjournals.org/content/26/3/195.full Rabbit Production by Steven D. Lukefahr http://www.ufaw.org.uk/DENTALMALOCCLUSIONNETHERLANDDWARF.php http://www.bio.miami.edu/hare/dental.html http://www.doubledeckerrabbitry.com/rabbit_color_genetics http://www.debmark.com/rabbits/genetics.htm http://rabbitgenetics.weebly.com/index.html
  24. 24. Thanks for Watching!
  1. A particular slide catching your eye?

    Clipping is a handy way to collect important slides you want to go back to later.

×