Answer to Question #169682 in Genetics for Meryem

Question

what is the advantage of a Hetrizygous?

Answer 1

Heterozygote advantage is selective advantage occurring to heterozygotes in populations and which may be responsible for some balanced polymorphisms. Mutations in diploids arise in the heterozygous condition and must, therefore, confer an advantage in that state if they are to spread. Theory has it that if a mutation is advantageous, selection will make its advantageous heterozygous effects dominant and its deleterious effects recessive, thus giving heterozygotes a higher fitness than homozygotes.