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

solution:
Project: To find out the dominant coat colour in dogs.

Material required: Notebook, pencil.

Procedure: Observe different colour of pet dogs kept by your friends and note their different coat colour.

You may be able to find different coat colours such as, grey, white, black, brown, etc. Note your reading in the observation table.

Make a survey of different populations to determine the frequency of different coat colours in dogs. Find the percentage distribution of each coat type, out of the total number of dogs studied for the coat colour.

Total number of dogs studied $=$.

$\%$ of Grey dogs $=$

$\%$ of Black/brown dogs $=$

$\%$ of White dogs $=$

Conclusion : Draw conclusion on the basis of your data collected.

Let us assume in dogs, the coat/skin colour grey is found in more numbers, while black/brown are in less number. In dogs/cats, the gene for the coat colour is present on 'X' chromosomes, In dogs, for the recessive colour to express, both the 'X' chromosomes must carry the genes for the recessive coat colour which is possible in less number. Thus black/brown colour is a recessive character for coat colour in dogs, the dominant colour (with high \% of individuals) can express both in homozyous and heterozygous form in dogs. Therefore dominant coat colour in dogs is grey.