Compaction of chromosomes occurs in

A.      Leptotene

B.      Zygotene

C.      Diplotene

D.     Metaphase

The stage at which chromosomes start pairing together is

A.      Pachytene

B.      Zygotene

C.      Leptotene

D.     Diplotene

The synaptonemal complex is visible under

A.      Light microwave

B.      Electron microscope

C.      Compound microscope

D.     Simple microscope

The synapsed homologous chromosomes form

A.      Tetrad

B.      Bivalent

C.      Both A and B

D.     Diad

Bivalent is clearly visible at which stage?

A.      Pachytene

B.      Leptotene

C.      Zygotene

D.     Diplotene

Which of the following is the shortest phase among the following?

A.      Prophase l

B.      Zygotene

C.      Pachytene

D.     Both A and B

The appearance of recombination nodule is  a characteristic feature of

A.      Pachytene

B.      Zygotene

C.      Diplotene

D.     Diakinesis

Recombination nodules are

A.      Sites over sister chromatids

B.      Sites over non-sister chromatids

C.      Sites over homologous chromosomes

D.     Sites over non-homologous chromosomes

Which of the following is an enzyme mediated process?

A.      Crossing over

B.      Synapsis

C.      Leptotene

D.     Both A and B

Recombination of genetic material occurs

A.      Because of synapsis

B.      Because of crossing over

C.      Because of termination of chiasmata

D.     Because of X Shaped structure