Rabbits
Possibility
Genes
• Possible genotypes for a gene
• 1) 2 Dominant Alleles
• 2) 1 Dominant Allele, 1 Recessive Allele
• 3) 1 Recessive Allele, 1 Dominant Allele
• 4) 2 Recessive Allele
4 X 4 X 4 X ….. X n = 4𝑛
Phenotype
• For example, Appearance with A
• Three possible genotypes : AA or Aa and aA
A Rabbit with Black fur(B)
• Phenotype B
• Three possible genotypes : BB, Bb, bB
• A rabbit with genotype ‘bb’ will have brown fur.
• Since an allele is inherited from each parents, possibility can be
calculated based on the possible outcomes.
BB(1/3)
Bb(1/3)
bB(1/3)
Possibility of getting B
dominant allele from
the gene.
1
½
½
Possibility
1/3
1/6
1/6
So, the total possibility of getting a B dominant allele from a single parent rabbit that has a
1
1
1
2
phenotype B is = 3 + 6 + 6 = 3
Whereas, the total possibility of getting a b recessive allele from a single parent rabbit that
1
has a phenotype B is = 3
Possible genotypes of Kitten(baby rabbit)
• Four possible outcomes : BB, Bb, bB, bb
• As getting a dominant B allele has a possibility of 2/3 and getting a
recessive b allele has a possibility of 1/3,
BB
Bb
2 2
×
3 3
4
9
Possibility
8
bB
2 1
×
3 3
2
9
bb
2 1
×
3 3
2
9
1
1 1
×
3 3
1
9
Therefore, 9 of the kittens will have black fur, and 9 of the kittens will have brown fur.
2nd Generation(After excluding brown furred
rabbits)
BB(1/2)
Bb(1/4)
bB(1/4)
Possibility of getting B
dominant allele from the
gene
1
½
½
Possibility
½
1/8
1/8
So, the total possibility of getting a B dominant allele from a single parent rabbit that has a
1
1
1
3
phenotype B is = 2 + 8 + 8 = 4
Whereas, the total possibility of getting a b recessive allele from a single parent rabbit that
1
has a phenotype B is = 4
Possible genotypes of Kitten(baby rabbit)
• Four possible outcomes : BB, Bb, bB, bb
• As getting a dominant B allele has a possibility of 3/4 and getting a
recessive b allele has a possibility of 1/4,
BB
Bb
3 3
×
4 4
9
16
Possibility
15
bB
3 1
×
4 4
3
16
Bb
3 1
×
4 4
3
16
1
1 1
×
4 4
1
16
Therefore, 16 of the kittens will have black fur, and 16 of the kittens will have brown fur.
rd
3
Generation
BB(3/5)
Bb(1/5)
bB(1/5)
Possibility of getting B
dominant allele from the
gene
1
1/2
½
Possibility
3/5
1/10
1/10
So, the total possibility of getting a B dominant allele from a single parent rabbit that has a
3
1
1
4
phenotype B is = 5 + 10 + 10 = 5
Whereas, the total possibility of getting a b recessive allele from a single parent rabbit that
1
has a phenotype B is = 5
Possible genotypes of Kitten(baby rabbit)
• Four possible outcomes : BB, Bb, bB, bb
• As getting a dominant B allele has a possibility of 4/5 and getting a
recessive b allele has a possibility of 1/5,
BB
Bb
4 4
×
5 5
16
25
Possibility
24
bB
4 1
×
5 5
4
25
bb
4 1
×
5 5
4
25
1
1 1
×
5 5
1
25
Therefore, 25 of the kittens will have black fur, and 25 of the kittens will have brown fur.
Conclusion
• When a rabbit with a certain phenotype is chosen, the equation for
the possibility of having the same phenotype offspring is
(𝑛𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑔𝑒𝑛𝑒𝑟𝑎𝑡𝑖𝑜𝑛+2)2 −1
, provided that the offspring without the
(𝑛𝑢𝑚𝑏𝑒𝑟 𝑜𝑓 𝑔𝑒𝑛𝑒𝑟𝑎𝑡𝑖𝑜𝑛+2)2
trait is removed from the herd.
Gestation period and price
The average rabbit can start breeding after 6 months.
Their gestation period is 31 days, and after giving birth a rabbit can
rebreed after 14 days.
Starting with 2 rabbits, within 8 generations we could have 99% of the
desired black rabbit.
Each rabbit can sell for $50
Option B
•
•
Positives
Sell for much more
• $50 minimum, up to $300 for ideal
phenotypes
Larger litter size
• Around 60 per clutch
•
•
Negatives
Must mature for longer before breeding
• 12-18 months
Initial parents more expensive
• Around $50 each
Typing Bearded Dragons
• “Hypo” (Hypomelanistic): Less black pigment in eyes, nails, and skin;
true hypos (mm) have clear nails
• “Trans” (Translucent): Body lacks white pigment, true trans (ww)
would have black eyes
• Het ____ (heterozygous): a carrier of one or both of the above
genes
"Bearded Dragons Types, Colors, and Species." The Bearded Dragon.
N.p., n.d. Web.
"Inland Bearded Dragons." Inland Bearded Dragons. N.p., n.d. Web. 25
Aug. 2016.
"AZ Rabbits.com." Breeding. N.p., n.d. Web. 24 Aug. 2016.
http://beardiedragblog.blogspot.com/2013/06/bearded-dragongenetics.html