This cross will yield four phenotypes in the 1: 1: 1: 1 ratio:
rryy x rryy
rryy x rryy
rryy x rryy
rryy x rryy

The answer would be:

RrYy x rryy

Here's more about your question:

The Punnet square for this cross is attached below.

As you can see the results will be:

RrYy = 4/16 = 1/4

rrYy = 4/16 =  1/4

Rryy = 4/16 = 1/4

rryy = 4/16 =  1/4

All four phenotypes have a 1/4 chance of occurring. So the ration between them would be 1:1:1:1

characterization of nanoparticles is a critical step in nanomaterial production as it provides information of dimension, morphology, surface charge, distribution and degree of surface functionalization.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.