أوراق عمل أحياء مع الحل الأحياء للصف التاسع متقدم منهج انجليزي الفصل الثالث

أوراق عمل أحياء مع الحل الأحياء للصف التاسع متقدم منهج انجليزي الفصل الثالث

03: Answer the following questions briefly

Give TWO examples Of somatic cells and TWO examples Of sex cells (gamete). Then write where each one of them kxate the human body

During which phase do homologus chromosomes separate

. What is the sex of a with two X chromosomes

. What is the meaning Of sexual reprcxiuction

. What is the difference bEtween autosome and a sex chromcNme

6. What is gametogenesis

7. HOW and egg cell differs

. What is the differencæ chromtNrne and sister chrornatids

. What an egg contribute to an embryo ? What a cnntribute to an embryo ?

. Where are bcxfies made, in the male or in the female

1. What is the term used to name the stage shown in part F of the diagram 2 ? Describe the events that take place during this stage

2. What is the term used to narme the shown in part D Of the I ? Describe
the events that take place during this stage

. Write the letter tlat shows the division of sister chromatids

4. Write the term used to describe the cells in part J Of diagram 2. two differenæs between the in J and the in part D

03: Answer the following questions briefly

Give TWO examples Of somatic cells and TWO examples Of sex cells (gamete). Then write where each one of them kxate the human body

Somatic cells are located in the body cells. Example: brain and eye cells. Sex cells are in the reproductive organs (ovaries and testes). Example: egg and sperm

During which phase do homologus chromosomes separate

Anaphase I

. What is the sex of a with two X chromosomes

F emale

. What is the meaning Of sexual reprcxiuction

involves the fusion Oftwo nuclei gametes (egg and sperm cell), resulting in offspring that are a genetic mixture of both parents

. What is the difference bEtween autosome and a sex chromcNme

Autosome chromosome are chromosomes from I to 22 that contain genes for characteristics not directly related to the sex of an organism

Sex chromosome are chronsotnes that directly control the development Of sexual characteristics

6. What is gametogenesis

Gametogenesis is the production of gametes

7. HOW and egg cell differs

Sperm is the male gamete, egg is the female gamete

Sperm is much smaller in size than the egg

. What is the differencæ chromtNrne and sister chrornatids

Homologous chrornosome are two chromosomes having the same structure, inherited from mother and one from father. While sister chromatids are two chromatids for the same chromosome

. What an egg contribute to an embryo ? What a cnntribute to an embryo ?

Egg contributes DNA only. While sperm contributes DNA, organelles and nwlecular building blocks

. Where are bcxfies made, in the male or in the female

Female (during egg production)

04: the diagram below to the following questions

Diagram I

Diagram 2

1. What is the term used to name the stage shown in part F of the diagram 2 ? Describe the events that take place during this stage

'metaphase I

Spindle align the along the cell equator Each Side Of the equator has chromosomes from both parents

2. What is the term used to narme the shown in part D Of the I ? Describe
the events that take place during this stage

Telophase

Nuclear membrane Start to form, chromosomes begin to uncoil , and the spindle fibers fall apart

. Write the letter tlat shows the division of sister chromatids

4. Write the term used to describe the cells in part J Of diagram 2. two differenæs between the in J and the in part D

Telophase 11

Part J Telophase II in Meiosis II where the result is 4 haploid cells (I n) While part D represents Telophase in Mitosis where the result is 2 diploid cells (2n)