Question

In incomplete dominance and co-dominance, genotypic and phenotypic ratios are identical, Explain how co-dominance differs from incomplete dominance in phenotypic nature of their hybrids.

Answer 1

in the case of incomplete dominance ,the hybrid didn't resemble either of the two parents and was intermediate between the two. the expression of the parent is combined.
for eg-in snapdragon ,colour of flower is pink if white flowered plant and red flowered plant are crossed.
RED(RR)    ×    WHITE(rr)    →  PINK(Rr)
in case of codominance,the hybrid resembles both the parent,i.e. both the parents express separately. 

for eg- ABO blood group. Ia,Ib are codominant alleles and both express independently together
IA    ×   IB      ⇒IAIB (AB BLOOD GROUP)
MARK AS BRAINLIEST IF LIKE

Answer 2

Answer:

In both incomplete dominance and codominance, both phenotypic and genotypic ratios are identical 1:2:1 in F$$_2$$ generation. In incomplete dominance, the phenotype of hybrid is intermediate between the two parents as both the alleles express themselves partially. However, in codominance, there is no intermediate expression as both the alleles express themselves equally. In incomplete dominance, the phenotypic effect of one allele is more prominent than the other while in codominance the phenotypic effect of both the alleles is equally prominent and therefore, they produce altogether a third type of phenotype.