What are the genotypes and type of inheritance?

the only way all the offspring could be hybrids is if both parents were pure bred, RR and rr. If you do a punnett square youll see that this is the only way all other combinations would give a chance for some other phenotype. This type of inheritance is called incomplete dominance it is the same as crossing a red flower and white flower and getting a pink offspring. The phenotypes mix and a mixture of the two are shown. Do not confuse this with codominance where both phenotypes are shown at the same type such as in my flower example you would get a red and white striped flower rather than a pink one.