A. be homozygous.
B. display the same phenotype as the RR parent.
C. display the same phenotype as the rr parent.
D. have the same genotype as the RR parent.
E. have the same genotype as the rr parent.
Think of it this way.... Parents will donate only one allele (one letter) to it's offspring. So if you have RR x rr
Let's say the dad is RR ...
The expert examines dominant offsprings in genetics. The homozygous and phenotypes are given.