Zygotene

Q. A tetrad is made of:

1. Four non-homologous chromatids
2. Four homologous chromosomes with four chromatids
3. Four non-homologous chromosomes
4. Two homologous chromosomes each with two chromatids

Q.

Synaptonemal complex is formed during

1. Diakinesis

2. zygotene

3. Leptotene

4. Diplotene

Q.

Which of the following occurs in meiosis but not in mitosis?

1. Attachment of spindle fibres to the kinetochores

2. Pairing of homologous chromosomes at the metaphase plate

3. Replication of DNA prior to the start of cell division

4. Separation of sister chromatids at anaphase

Q.

During synapsis the number of thread (Chromonemata) in each chromosome is:

1. Two

2. Four

3. Eight

4. Many

Q.

Describe the following:

(a) synapsis (b) bivalent (c) chiasmata

Draw a diagram to illustrate your answer.

Q. Terminalisation of chiasmata occurs during:

1. Diakinesis
2. Pachytene
3. Diplotene
4. Zygotene

Q. Bivalents are formed in meiosis during _________ phase.

1. leptotene
2. zygotene
3. pachytene
4. diakinesis

Q.

Chiasmata forms in which of these phases ?

1. Diplotene

2. Metaphase

3. Zygotene

4. Anaphase

Q.

What is the significance of Meiosis.

Q.

Which of the following is not a characteristic feature of mitosis in somatic cells?

1. Synapsis

2. Formation of spindle fibres

3. Disappearance of nucleolus

4. Chromosome movement