Question

1. the drawings a - e show stages of mitosis in a plant cell.

a. which of the drawings a - e shows
interphase ______ (dna is replicated)
prophase ______ (chromosomes – 2 sister chromatids – shorten)
metaphase ______ (sister chromatids line up)
anaphase ______ (sister chromatids separate)
telophase ______ (new nucleus forms at each end)
cytokinesis ______ (cell contents divided between 2 daughter cells)

b. give two processes which occur during interphase and which are necessary for nuclear division to take place.
________________________ of the cell and ________________________ of the dna

1. this drawing shows various stages of mitosis in a fast growing onion root tip.

identify the cells (by number) which are in the following stages of mitosis:
interphase
prophase
metaphase
anaphase
telophase

Explanation:

Step1: Match mitosis stages (Q7a)

Interphase (C): Cell has intact nucleus, DNA replicates here.
Prophase (B): Chromosomes condense, spindle forms.
Metaphase (E): Chromatids line up at equator.
Anaphase (A): Chromatids separate, move to poles.
Telophase (D): New nuclei form at ends.
Cytokinesis (D): Cell plate divides cytoplasm.

Step2: Identify interphase processes (Q7b)

Growth of cell, replication of DNA are required for division.

Step3: Match onion root cells (Q8)

Interphase: Cells with intact nucleus (4,5,6,8,10,13,15,16,18)
Prophase: Chromosomes condense (2,14)
Metaphase: Chromosomes line up (1,11,17)
Anaphase: Chromatids separate (7,9)
Telophase: New nuclei form (3,12)

Answer:

Question 7a

interphase $\boldsymbol{C}$
prophase $\boldsymbol{B}$
metaphase $\boldsymbol{E}$
anaphase $\boldsymbol{A}$
telophase $\boldsymbol{D}$
cytokinesis $\boldsymbol{D}$

Question 7b

$\boldsymbol{Growth}$ of the cell and $\boldsymbol{replication}$ of the DNA

Question 8

interphase: 4, 5, 6, 8, 10, 13, 15, 16, 18
prophase: 2, 14
metaphase: 1, 11, 17
anaphase: 7, 9
telophase: 3, 12