Teaching genetics is a difficult concept and if you have a blind student, you may not know where they are having a problem if you can't see what they are doing in their punnett squares. I have made these cutouts for monohybrid crosses. I put the alphabetical letter and the braille letter on each square so that the student and I can see what each other are doing. These cutouts include simple dominant/recessive traits, blood types (codominance and incomplete dominance as well), and sex-linked traits. You will need to get a rubber mat to push the braille letters up for your student to feel. Let me know if you have any questions or concerns. I have lots of ideas for a blind biology student!
If you would like to purchase items that are already made, you can order from my Etsy store by using the link provided. If you do not have a rubber board, this may be a better option.