Interaction between two alleles which are present on the same gene locus of two homologous chromosomes is called

The best example for pleiotropy is:

Choose the correct statements for co-dominance and incomplete dominance respectively from the following.

(i) Codominance
(ii) In complete dominance

(A) ${\mathrm{F}}_1$ generation did not resemble either of the two parents.
(B) In ${\mathrm{F}}_1$ generation new traits other than parents will be expressed.
(C) In ${\mathrm{F}}_1$ generation, the progeny resembles both parents equally.
(D) ${\mathrm{F}}_1$ generation will show a 3:1 ratio.

Human height is a multigenic character. If the heights of all the individuals living in a metropolis are measured and the percentages of the population belonging to a specific heat are plotted as shown below, which of the plots would represent the most realistic distribution?

Match the following 

The correct answer is

Statement (S): The heterozygous individuals for sickle-cell anaemia $\left({\mathrm{Hb}}^{\mathrm{A}}{\mathrm{Hb}}^{\mathrm{S}}\right)$ express disease phenotype and also carriers of the disease.

Reason (R): ${\mathrm{Hb}}^{\mathrm{A}}{\mathrm{Hb}}^{\mathrm{S}}$ genotype individuals are resistant to severe effects of malaria.

The correct answer is