PLEASE EXPLAIN HOW TO USE THE PUNNET SQUARE!

Question

The following Punnett Square shows a cross between two hybrid flowers. If the flowers show incomplete dominance, what fraction are pure red?

1/4 1/2 3/4 0

Answer 1

The fraction that shows pure red is the fraction of "1/4". Pure red indicates that it is based on a homozygous dominant pair which is RR.

The table is divided into 4 parts, so think of that as a denominator. However, only one division of that table shows a homozygous pair of RR, the numerator will then be 1. Therefore, the only fraction you would consider will be 1/4.

I hope this made sense. If you have any questions, I would love to answer them.