Ovum Structure

Q. Which of the following contains a fluid filled cavity called antrum?

1. Primary spermatocyte
2. Primary follicle of ovary
3. Secondary spermatocyte
4. Tertiary follicle of ovary

Q.

How many pairs of chromosomes are in a zygote?

Q. In human, during fertilisation, a sperm firstly comes in contact with which layer of the ovum.

1. Vitelline membrane

2. Jelly coat

3. Zona pellucida

4. Corona radiata

Q.

How many sperm cells can fertilize an egg?

Q.

Grey crescent is the area.

Q. Which of the following layers in an antral follicle is acellular?

1. Zona pellucida
2. Granulosa
3. Theca interna
4. Stroma

Q.

What Prevents More Than One Sperm from Entering the Egg?

Q.

Why do only male gametes have a tail?

Q.

The primary and secondary oocytes are suspended in prophase I and metaphase II respectively due to secretions from the

1. Sertoli cells

2. Granulosa cells

3. None of the above

4. Zona Pellucida

Q.

Vitelline membrane is a a)primary egg membrane b)secondary egg membrane c)tertiary egg membrane d)none

Q.

What are the functions of the follicles during oogenesis?

Q.

The progenies are found to be male sterile after crossing two plants this is due to some genes, which are present in:

1. Mitochondria

2. Cytoplasm

3. Nucleus

4. Chloroplast

Q.

State how sperms move towards the female germ cell?

Q.

What do you mean by cyst formation?

Q. Differentiate between male and female gametes.

Q. What is polar body in reproduction?

Q. What is clevage(comes before implantation)?
Explain.

Q. Which of the following is true for Spermatogenesis?

1. Spermatocytogenesis + Spermiation
2. Spermiogenesis + Spermiation
3. None of the above
4. Spermatocytogenesis + Spermiogenesis

Q.

Mature ovum in human being is surrounded by

1. Plasma membrane

2. Corona radiata

3. Zona pellucida

4. All of these

Q.

Fill in the blank with a suitable term:

Release of egg from ovaries is called ________.

Q. How does zp3 prevent polyspermy?

Q. Graafian follicle contains.

1. Many oocytes
2. Many sperms
3. A single oocyte
4. Site for egg fertilization

Q.

How long does DNA last in a womans body?

Q. Assertion : Reason: Role of zona pellucida is to check the implantation of the blastocyst at an improper site.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Compare the egg and the sperm in the human reproductive system
Which of the above comparisons are true?

	Egg(Ovum)	Sperm
1	It is the smallest cell in human body	It is the biggest cell in human body
2	It does not move much	It moves actively
3	It is a female reproductive cell	It is a male reproductive cell

1. 1 and 2 only
2. 1 and 3 only
3. 2 and 3 only
4. 1 , 2 and 3

Q. Differentiate between :
Zona pellucida and corona radiata

Q.

Where is the zona pellucida found?

Q. Write a short note on ovum and sperm.

Q. The number of chromosomes present in the gametes of a housefly is six. How many chromosomes are present in the meiocytes of a housefly?

1. 6
2. 24
3. 12
4. 46

Q.

What is the role of oviducts in the process of fertilization?