If one gene influences many phenotypic traits, the phenomenon is called

Study the following statements about the blood groups,
A) The genes for Rh antigen are located on somatic chromosome pair-1.
B) Multiple alleles occupy different loci of homologous chromosomes.
C) The expression of blood types in man is by 3 alleles of a single gene.
D) Blood cells of the foetus are destroyed by Ig G type of antibodies.

From the above, identify incorrect statements.

Assertion (A): Dominance is not an autonomous feature of gene
Reason (R): Two traits show up equally in the heterozygote's phenotype in codominance

Study the following statements and identify the correct combinations. The comect statements are
(i) Multiple alleles can occupy different loci on the same chromosome
(ii) Two alleles of gene can form three genotypes in a diploid organism
(iii) When more than two alleles exist in a population of a specific organism is called multiple allelisin
(iv) The number of phenotypes that can occur for multiple alleles is given by the expression $\frac{\mathrm{n}(\mathrm{n}+1)}{2}$
(v) A well-known example of multiple allelism is ' $\mathrm{ABO}°$ blood groups