Gametogenesis + Fertilization[1].

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Topic : Gametogenesis:

By : Dr. Sanaa

1.

Concerning gametogenesis :

a. Spermiogenesis is the first stage in spermatogenesis.

b. The sperm contains haploid number of chromosome. c. Primary oocytes can be formed after birth in females. d. Spermatogenesis begins at early foetal life.

2. Regarding the sperms : a.

They are formed in the seminiferous tubules of testis b.

They are preceded by a stage of spermatogonia. c.

They have one kind of sex chromosomes. d.

They contain massive amount of cytoplasm.

3.

In spermiogenesis: a.

It begins before puberty. b.

It is the 1 st stage of spermatogenesis. c.

The secondary spermatocyte changes to spermatid. d.

The spermatid changes to sperm.

4.

The primary oocyte is formed : a.

Prenatally (before birth). b.

Immediately after birth. c.

After puberty. d.

At ovulation.

5.

Regarding oogenesis : a.

Primary oocyte completes the first meiotic division before birth. b.

Second meiotic division gets completed at ovulation. c.

No primary oocytes are formed before birth. d.

It begins at early foetal life.

Topic : Fertilization & implantation

By : Dr. Sanaa Al-Shaarawy

1.

Fertilization usually occurs in : a. The fundus of the uterus.

b. The posterior wall of uterus. e. The isthmus of uterine tube. d. The ampulla of the uterine tube.

2.

Second meiotic division of the secondary oocyte is completed : a.

At Early foetal life. b.

Before ovulation. c.

At Fertilization. d.

In the Menestrual cycle.

3.

Fertilization: a.

Occurs on the medial side of uterine tube. b.

Results in initiation of cleavage of the zygote. c.

Results in the formation of a haploid cell. d.

Stimulates the oocyte to complete its 1 st

meiotic division.

Topic : Implantation:

By : Dr. Sanaa Al-Shaarawy

4.

Regarding implantation : a.

Syncytiotrophoblast is the most active layer invading the endometrium.. b.

It starts by the third day of fertilization. c.

It is not preceded by degeneration of the zona pellucida . d.

It can not be detected by sonography.

5.

Regarding the blastocyst : a.

It is formed by the 3 rd

day of fertilization. b.

Implantation begins at 6 th

day after fertilization.. c.

It has a blood filled cavity. d.

Its cells differentiate into inner, outer and intermediate masses.

2.c

3.b

4.a

5.b

Answer :

Gametogenesis :

1.b

2.a

3.d

4.a

5d

Fertilization :

1.d

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