Define sex linkage.

Define sex linked inheritance.

Define linkage . Mention its types.

Define linkage groups.

Who demonstrated sex linkage for the first time _____

Who reported incomplete linkage

Match the column I with column II : {:("Colum I ","Column II"),("(1) T.H. Morgan ","(i) Sex determination in plants"),("(2) C.E. Allen","(ii) Rediscovery of Mendel's work"),("(3) Hugo de varies","(iii) Sex linkage in Drosophila"),("(4) Tschermak ","(iv) Mutation theory"):}

Which of the following is suitable for experiment on linkage ?

Which of the following sentences are correct? 1. The offspring exhibit only parental combinations due to incomplete linkage. 2. The linked genes exhibit some crossing over in complete linkage. 3. The separation of two linked genes are possible in incomplete linkage. 4. Crossing over is absent in complete linkage.