The finding that a cross between a red snapdragon and a white snapdragon produces a pink snapdragon appears to support the blending hypothesis.

Question

What finding would convince you that the underlying gene still follows the particulate hypothesis and why? 

Answer 1

Great question!

The blending hypothesis supports the phenotype of the offspring to be some kind of mix of the two parents' trait. For example, a 6-foot man and a 4-foot woman would have a child with a height somewhere in between, say around 5 feet. A blend.

Or Red (R) Snapdragon x White (W) Snapdragon = Pink (RW) Snapdragon.

To support Mendel's particulate hypothesis, the offspring would have to look like this:

Red (RR) Snapdragon x White (rr) Snapdragon = Red (RR) Snapdragon 25% + Red (Rr) Snapdragon 50% + White (rr) Snapdragon 25%

Where the dominant allele masks the recessive trait. There is no blending allowed in the particulate hypothesis.