Biology 9th Class Urdu Medium Chapter 4(Cells and Tissues) Online Short questions with Answers Preparation

Question # 1

Difference between Mitosis and Meiosis

Ans 1: Mitosis:
It takes place in somatic cells
It consists of one division
Crossing over does not take place drung prophase
Chromatides divides at anaphase
Individiual duplicated chromosome align at the metaphase plate during metaphase
Daughter chromosoem mvoe to opposite poles during anaphase
Two dipliud daughter cells are formed.
The number of chromosomes remains censtant.
Ans 2: Meiosis:
It takes place in germ line cells of sex organs.
It consists of two divisions
Crossing over takes place duirng prophase-I
Chromatids does not divide at anaphase-I
Paired homolgous chromosomes align at metaphase plate during metaphase-I
Homolgous chromosomes with two sister chromatids, separate and move to opposite poles during anaphase-I
Four haploid daughter cells are formed.
The Number of chrosomes becomes half in meiosis.
Meiotic product cannot undergo further divisions.

Question # 2

Centromeres and kinetochores

Ans 1: Centromeres:
The centromere is a constriction in chromosome
Ans 2: Kinetchores:
Kinetochores are proteins that act as attachement site for spindle fibres

Question # 3

What are sister chromatides, and when do they separate in meiosis.

Ans 1: Sister chromatide are identical copies of a single chromosomess. These sister chromatides are separated during anaphase -II of mciosis.

Question # 4

Difference between Centromeres and Centrioles

Ans 1: Centromeres:
The centromere is a constriction in chromosome, where chromatids are joind with eachother.
Ans 2: Centrioles:
a pair of centrioles locatd near the anterior surface of the nucleus. It consist of triple of microtublues arrange dto form a hollow cylinder.

Question # 5

During which phase of mitosis sister chromatides separate?

Ans 1: During anaphase spidnle fibres attached with chromosoems pull towards teh poles, making the sister chromatids for chromosomes separated.

Question # 6

Difference between Diploid cells and Haploid cells

Ans 1: Diploidmeans cells have full number of chromosomes
Somatic cells are diploid (2n) cells.
These are responsible for growht and maintenance of the organismsm
These are producred by meiosis.
Diploid number of chromosomes in man in 46
Ans 2: Haploid Cells:
Haploid means cells having half number of chromosomes
Germ line cells are haploid (n) cells.
These are involved in sexual reproduction.
Theser are proeuced by mitosis
The haploid number of chromosomes in man is 23

Question # 7

What is the mian purpose of the S Phase in the cell cycle.

Ans 1: During this phase the DNA of each chromosome is replicated . It results in the duplication of chromosoems chromosomes consists of two sister The totla number of chromosomes in celll remains the same.

Question # 8

How is mitosis related to the process of regeneration.

Ans 1: Some animals can regenerate parts of the body For this purpose, they form new cells by carrying out mitosis in the cells of remaning parts.

Question # 9

How does crossing over contribute to genetic variation in meiosis?

Ans 1: During crossing over, exchange of segements of non -sister chromatide os homolgous chromosomes take place. This process leads to recombination of genetic material andincrease genetic diversity.

Question # 10

What is the differecne between prophase of mitosis and prophase -I of meiosis-I.

Ans 1: Prophase of mitosis:
Pairing of homolgous chromosomes does not take palce
Crossing over is absent
Ans 2: Prophase -I of mesiosis-i:
During Prophase-I paring of homolgousl chromosomes takes palce
Crossing over leads to genetic recombination.

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Online Short Questions For Chapter 4 "9th Class Biology Urdu Medium Chapter 4 Preparation "

Biology (New Book) - 9th Class Biology Urdu Medium Chapter 4 Preparation

Difference between Mitosis and Meiosis

Centromeres and kinetochores

What are sister chromatides, and when do they separate in meiosis.

Difference between Centromeres and Centrioles

During which phase of mitosis sister chromatides separate?

Difference between Diploid cells and Haploid cells

What is the mian purpose of the S Phase in the cell cycle.

How is mitosis related to the process of regeneration.

How does crossing over contribute to genetic variation in meiosis?

What is the differecne between prophase of mitosis and prophase -I of meiosis-I.

Prepare Complete Set Wise Questions For Chapter 4 "9th Class Biology Urdu Medium Chapter 4 Preparation "

Set 1

9th Class Biology Urdu Medium Chapter 4 Preparation - Set 1

Difference between Mitosis and Meiosis

Centromeres and kinetochores

What are sister chromatides, and when do they separate in meiosis.

Difference between Centromeres and Centrioles

During which phase of mitosis sister chromatides separate?

Difference between Diploid cells and Haploid cells

What is the mian purpose of the S Phase in the cell cycle.

How is mitosis related to the process of regeneration.

How does crossing over contribute to genetic variation in meiosis?

What is the differecne between prophase of mitosis and prophase -I of meiosis-I.

9th Biology Urdu Medium Chapter 4 Preperation

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