Red-green Color vision deficiency (CVD) has a high prevalence and is often a handicap in everyday life. The fact that most of the students do not know they have CVD due to non testing of color vision. All Science faculty students of the ASC Rahuri College in the age range of 17-19 were screened for Red-green CVD by using Ishihara test plates from 2001 to 2010. Thus total 654 males and 292 female students were screened during 10 years. The collected data were analyzed for frequency estimation among males and females and then estimating mating types by using the Hardy-Weinberg Principle. Frequency of color blindness in males was 0.303 and that in females 0.288. Predicted mating types show a higher contribution of carrier females, and homozygous color blinds than expected. Estimated normal mating type is only 35.35%. Prevalence of Red-green CVD was found considerably high among science students and
specifically among females which is unusual. Mating types involving carrier females, colorblind females, and colorblind males together show a very high contribution than normal ones.