The coat color of rabbits is controlled by multiple alleles of the C gene. There are four main alleles - C for full color, Cch for chinchilla, C(H) for Himalayan, and c for albino. C is fully dominant to the other alleles. Cch is fully dominant to c. The C(H), shaded, and c alleles show incomplete dominance as their phenotypes blend together in combinations. A cc combination results in the fully recessive albino phenotype.

1. M U LT I P L E A L L E L E S
C O AT C O L O R I N R A B B I T S
P R E S E N T E D BY : T E H R E E M A F Z A L

2. MULTIPLE ALLELES
• Multiple alleles :Three or more alternative forms of a gene
(alleles) that can occupy the same locus. However, only two
the alleles can be present in a single organism.
• For example,
• the ABO system of blood groups is controlled by
three alleles, only two of which are present in an individual.
• Coat color in rabbits

3. MULTIPLE ALLELES

4. MULTIPLE ALLELES IN RABBIT
Mendel thought that each gene had two alleles :dominant or
recessive. But there are some genes which have more than two alleles.
If three or more alleles are found in a population .we say these genes
have multiple alleles
THE C GENE IN RABBIT (COAT COLOR)
The coat of rabbit may have following different colors:
• Full color
• Chinchilla
• Himalayan
• Albino

6. THE C GENE IN RABBIT
• Full color : The coat of the ordinary rabit is referred to as
agouti or full color ,in which individuals have banded hairs
,the portion nearest the skin being grey ,succeeded by a
yellow band ,finally a black or brown tip . The genes for full
colour are represented by capital letter C .

7. CHINCHILLA
• In some individuals ,the coat lacking the yellow pigment and
due to the optical effect of black and gray hairs , have the
appearance of silvery grey . That color is called chinchilla. If it
carries a gene recessive to it then it is heterozygous. It cannot
carry Full Color because a recessive gene cannot carry a gene
that is dominant to it.

8. HIMALAYAN
The Himalayan type coat is white except for black extremities
(nose ,ears ,feet and tail).The eyes are pigmented .

9. ALBINO:
• The albino coat totally lacks in pigmentation and the eyes of
an albino also remain pink due to lack of pigment in iris of
eye . The gene for albino is represented by c.

10. • These C mutations are listed in order of dominance. The 'C'
is completely dominant. The cch3 is also completely
to the 'c' mutations below it. However the shaded,
and albino mutations exhibit signs of incomplete dominance
they tend to bleed into each other and exert a blended
on the rabbit. A 'cc' albino combination however is
recessive.