question_answer

What is the chromosome theory of linkage and who proposed it?

Answer:

Morgan and Castle in 1911 proposed the chromosome theory of linkage. It states that,

(i) linked genes occur in the same chromosome.

(ii) they lie in a linear sequence in the chromosome.

(iii) they have tendency to maintain the parental combination of genes except for occasional cross overs.

(iv) strength of the linkage between two genes is inversely proportional to the distance between them.