Question

Many serious diseases can be passed from parent to offspring through genes. In which case given below is a recessive disease NOT able to be passed on?
if one parent has one allele or has no alleles for the disease
if one parent has zero, one, or both alleles for the disease
if one parent has no alleles for the disease
if one parent has both alleles for the disease only

Answer 1

the answer is if one parent has no allele

Answer 2

I think its if one parent has no alleles for the disease.