Question

Outline a project which aims to find the dominant coat colour in dogs.

Answer 1

The project is simple as follows :-

1-take a pure breed black fur dog.
2-take a pure breed Brown fur dog
>now crossbreed these two dogs, so what we observ in f1 generation according to mendel experiment the colour of the off spring which occurs in f1 generation is dominant so if all off spring are of black then black is dominated and if all offspring are of brown then Brown is dominated.. And which is now recessive is show its colour in one off spring of the f2 generation........... It is same as mendel pea plant experiment........ Hope it helps :-)

Answer 2

Outline a project which aims to find the dominant coat colour in dogs.

Dogs have a variety of genes that govern coat colour. There are at least eleven identified gene series (A, B, C, D, E, F, G, M, P, S, T) that influence coat colour in dog.

A dog inherits one gene from each of its parents. The dominant gene gets expressed in the phenotype. For example, in the B series, a dog can be genetically black or brown.

Let us assume that one parent is homozygous black (BB), while the other parent is homozygous brown (bb)

__________________

BB

Bb Bh Bh

bb Bh Bh Bh

Bh Bh Bh


In this case, all the offsprings will be heterozygous (Bb).

Since black (B) is dominant, all the offsprings will be black. However, they will have both B and b alleles.

If such heterozygous pups are crossed, they will produce 25% homozygous black (BB), 50% heterozygous black (Bb), and 25% homozygous brown (bb) offsprings.

B h

B BB Bh

h Bh Bh