(a) Incomplete dominance: where heterozygotes have an intermediate phenotype in-between the two homozygous phenotypes.
(b) Complete dominance: Complete dominance is a form of dominance in a heterozygous condition wherein the allele that is regarded as dominant completely masks the effect of the allele that is recessive.
Linked genes are genes that are likely to be inherited together because they are physically close to one another on the same chromosome. So when the parental gene are linked the parental combination be much higher than the nonparental types.