question_answer

Differentiate between linkage and recombination.

OR

Life originated from inorganic atom earlier but it is not possible today. Give reasons.

Answer:

The main differences between linkage and recombination are as follows:
Linkage	Recombination
(i) Cause of inheritance.	Cause of variation.
(ii) Tendency of genes to stay together.	Tendency of genes to segregate.
(iii) Accounts for parental combination.	Accounts for recombinants.
(iv) Ratio remain fixed.	Ratio variable depending on % of recombination.
OR
Life originated from inorganic atoms earlier but it is not possible today because-
(i) Presence of \[{{O}_{2}}\]
(ii) Absence of high temperature and other climatic factors that was present in primitive atmosphere but not present today.