Colour blindness is more likely to occur in males than females because?
the genes are sex linked recessive
The gene is recessive one on the X chromosome, so there is no dominant gene on the Y chromosome to keep the trait from being expressed in the phenotype.
The reason why color blindness is more likely to occur in males than females is due to a genetic factor. Color blindness is predominantly inherited through the X chromosome. Since males have one X chromosome and one Y chromosome (XY), while females have two X chromosomes (XX), they have a higher chance of inheriting the color blindness gene.
The gene responsible for color vision is carried on the X chromosome. If a male inherits a defective color vision gene on his X chromosome, he will have a higher likelihood of being color blind as he doesn't have a second X chromosome to compensate for the defect. In contrast, if a female inherits a defective gene on one X chromosome, there is a possibility that the second X chromosome may carry a normal version of the gene, which can often compensate for the defect.
This pattern of inheritance is known as X-linked inheritance or sex-linked inheritance. Since males have only one X chromosome, any abnormality present on that X chromosome will be expressed more readily. Females, on the other hand, tend to be carriers of color blindness if they inherit a defective gene from one parent, but are less likely to show the symptoms themselves.
It's important to note that while males are more likely to be color blind, not all males with color blindness inherit it from their parents. In some cases, color blindness can result from spontaneous genetic mutations or other factors not related to inheritance.