the gene for eye colour is located on ?
a) x chromosome
b) y chromosome
c) both a and b
d) non of them
There are several genes for eye color.
Since this is not my area of expertise, I searched Google under the key words "eye color gene location" to get these possible sources:
http://www.google.com/search?client=safari&rls=en&q=eye+color+gene+location&ie=UTF-8&oe=UTF-8
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.
To determine the location of the gene for eye color, we will need to refer to genetic knowledge. The gene for eye color is typically located on chromosomes. Humans have 23 pairs of chromosomes, one of which determines the individual's sex.
The X and Y chromosomes determine the sex of an individual. Males have one X and one Y chromosome (XY), while females have two X chromosomes (XX). The genetic information for eye color is not specifically located on the Y chromosome (option b) because this gene is not involved in determining eye color.
The gene for eye color is actually located on the X chromosome (option a). This means that individuals with two X chromosomes (females) have two copies of the eye color gene, while males only have one copy since they have one X chromosome.
Therefore, the correct answer is option a) X chromosome.