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Inheritance of Coat Colour

If a Black dog mates with a Yellow female, what colour will the puppies be?
The answer depends on the genes each parent carries.
The way the genes can be passed on is written out following a particular pattern.
First the parents genes are written with an x between to indicate a "cross" breeding.
eg. BbEE x BBee
Second: The genes the parents can pass on is written out into two tables.
eg. Taking the example above

Parent 1

 

Parent 2

 

B

b

 

 

B

B

E

BE

bE

 

e

Be

Be

E

BE

bE

 

e

Be

Be


Note that the coat colour genes are put in the top row of the table, and the expression genes are put into the side columns.
The results of this table give us all of the possible genes these two parents can pass on, and with this information, we can create another table to show us all of the types of puppies that could be produced.
All the Genes available from the first Parent are written in the top row, and the all the genes available from the second Parent are written down the column.

Parent 1 - Black (BbEE)

 

 

 

BE

BE

bE

bE

P
a
r
e
n
t

2


Y
e
l
l
o
w



B
B
e
e

Be

Be

Be

Be



So in this mating of a Black dog to a Yellow female, (BbEE x BBee) the only colour puppy produced is Black.
This result comes about because, the Black dog has dominant Expresion genes, (although he carries a gene for chocolate), and the Yellow female carries two dominant colour genes.
In this instance, half of the pups that could be produced would be Black carrying the ability to pass on yellow, and the other half would be Black, carrying both chocolate and yellow.
This 1/2 and 1/2 mix is the genetic probability.

Let's look at Chocolate dog genetics.



©  JMClarke 2003