Question

please yaar , i need help ,answer quickly. explain dominance,codominance and multiple allelism with the help of a single cross.​

Answer 1

Dominant refers to the relationship between two versions of a gene. Individuals receive two versions of each gene, known as alleles, from each parent

Co dominance is a relationship between two versions of a gene. Individuals receive one version of a gene, called an allele, from each parent.

Multiple allelism is the state of having more than two alternative contrasting characters controlled by multiple alleles at a single genetic locus.

Single cross

• When a tall plant crosses with a dwarf plant in the f1 generation all the offsprings are tall [Tt] here T is dominant over t
• The ABO system of blood groups is controlled by three alleles, only two of which are present in an individual.This represents multiple alleles
• Both alleles show dominance, as in the case of the AB blood type (IA IB) in humans.it represents codominance