Cell Division Biology - Cell Division

he disappearance of spindle and uncoiling of chromosomes takes place in

The nuclear membrane and nucleolus become indistinguishable during

How many chromosomes are found in a cell of humans?

The nuclear membrane disappears in

Duplication of DNA occurs in

Polytene chromosomes are found in _________ of fly larvae.

Chromosomes are _________ material.

The pairing of homologous chromosomes is called _______.

The spindle fibers are made of _______.

_______is the point at which sister chromatids are held together.

State the Location: Polytene chromosome

State the Location: Chromosomes

State the Location: Cell plate

State the Location: Asters

Write the functional activity of the following structure:
Colchicine

Mention three significant changes that occur in a cell during interphase.

What is the importance of chiasma formation?

How prophase-I of meiosis differs from prophase of mitosis in an essential way? Describe how it affects the daughter cells?

What is the importance of meiosis in creating variations?

Differentiate between
Cytokinesis in plant and animal cell

Draw a well-labelled diagram to show the anaphase stage of mitosis in plant cells having four chromosomes.

Draw a duplicate chromosome and label its part.

Draw a labeled schematic representation of mitosis cell division.

Give a labeled diagram to illustrate amitosis.

Write the name of various steps of cell cycle.

Name the two kinds of cell division found in living organisms.

(i) Draw a neat labeled diagram to show the metaphase stage of mitosis in an animal cell having ‘6’ chromosome.
(ii) How many daughter cells are formed at the end of mitosis and at the end of meiosis?
(iii) With reference to cell division explain the following terms:
(Chromatid, Centromere, Haploid).
(iv) Name the type of cell division that occurs during:
1. Growth of shoot 2. Formation of pollen grains.
3. Repair of worn out tissues.

Chromosomes are arranged in the form of chromatids at the equator in prophase.

Cytokinesis takes place through cleavage furrow in animal cells.

Chromosomes other than sex-chromosomes are autonomous.

Asexual reproduction is accomplished through mitosis.

The alkaloid colchicine inhibits the formation of the mitotic spindle.