Process of Spermatogenesis

Q.

How many sperms will be produced from 100 primary spermatocytes and how many eggs will be produced from 100 primary oocytes?

Q.

What is spermatogenesis ? Briefly describe the process of spermatogenesis.

Q. The correct sequence of spermatogenic stages leading to the formation of sperm in a mature human testis is:

1. Spermatogonia - spermatozoa- spermatocytes - spermatid
2. Spermatocytes - spermatogonia - spermatids - spermatozoa
3. Spermatogonia - spermatocytes - spermatids - spermatozoa
4. Spermatids - spermatocytes - spermatozoa - spermatogonia

Q. What is spermatogenesis? Briefly describe the process of spermatogenesis.

Q.

During spermatogenesis which of the following is the first cell to become haploid?

1. Primary spermatocyte

2. Spermatid

3. Spermatogonia

4. Secondary spermatocyte

Q.

The immature male germ cell undergoes division to produce sperms by the process of spermatogenesis. Choose the correct statement with reference to above.

1. Spermatogonia have 46 chromosomes and always undergo meiotic cell division

2. Primary spermatocytes divide by mitotic cell division

3. Secondary spermatocytes have 23 chromosomes and undergo second meiotic division

4. Spermatozoa are transformed into spermatids

Q.

Is Zona Pellucida acellular?

Q.

In humans, at the end of first meiotic division, the male germ cells differentiate into

1. Primary spermatocytes

2. Spermatids

3. Spermatogonia

4. Secondary spermatocytes

Q.

Are round spermatids and secondary spermatocytes haploid or diploid?

Q.

How many sperms are produced by 5 primary spermatocyte?

Q. What is spermiogenesis? Demonstrate diagrammatically the process of spermatogenesis.

Q. Statement 1: Each spermatogonium is diploid and contains 46 chromosomes.
Statement 2: Some spermatogonia, primary spermatocytes complete the meiotic division to form four haploid cells.

1. Statement 1 is incorrect but statement 2 is correct
2. Both statements are incorrect
3. Statement 1 is correct but statement 2 is incorrect
4. Both statements are correct

Q.

How long does spermatogenesis take on average to occur?

Q.

Which among the following has 23chromosomes?

1. Secondary oocyte

2. Oogonia

3. Spermatogonia

4. Zygote

Q.

Where are the seminiferous tubules located?

Q.

How many sperms do 20 secondary spermatocytes make?

Q. Study the flow chart given below and identify the missing parts $\text{A, B, C, D, E}$: –

1. $\text{A}-$Cellular, $\text{B}-$Acoelomata, $\text{C}-$Bilateral, $\text{D}-$Aschelminthes, $\text{E}-$Coelomates
2. $\text{A}-$Cellular, $\text{B}-$Coelomata, $\text{C}-$Radial, $\text{D}-$Aves, $\text{E}-$Pseudocoelomate
3. $\text{A}-$Cellular, $\text{B}-$Acoelomata, $\text{C}-$Radial, $\text{D}-$Mammalia, $\text{E}-$Pseudocoelomate
4. $\text{A}-$Cellular, $\text{B}-$Coelomata, $\text{C}-$Radial, $\text{D}-$Aschelminthes, $\text{E}-$Coelomates

Q. Give basic difference between spermatogenesis and oogenesis.

Q. Primary spermatocyte differs from spermatogonium in

1. number of chromosomes
2. size and volume
3. DNA content
4. size of chromosomes

Q. How many chromosomes does each human spermatogonium contain?

1. 46
2. 48
3. 26
4. 23

Q.

What is the difference between zona pellucida and corona radiata?

Q.

Where you can find the seminiferous tubule?

Q. How many sperms do produce from 4 primary spermatocytes?

1. 1
2. 4
3. 16
4. 32

Q. Give one significant difference between spermatogenesis and oogenesis.

Q. The given table shows differences between spermatogenesis and spermiogenesis. Select the incorrect option.

1. Spermatogenesis- Process of formation of spermatozoon.
   
   

   Spermiogenesis- Process of differentiation of spermatozoa from a spermatid.
2. Spermatogenesis- It changes a diploid structure into a haploid structure.
   Spermiogenesis- It involves the conversion of a haploid structure into another haploid structure.
3. Spermatogenesis- Growth and divisions occur.
   Spermiogenesis- Divisions and growth are absent.
4. Spermatogenesis- A spermatogonium forms four spermatozoa.
   Spermiogenesis- A spermatid forms a single spermatozoon.

Q.

How many sperms will be obtained from 200 Spermatids?

Q. Arrange in correct sequence the structures formed during spermatogenesis.
(a) Spermatogonia
(b) Secondary spermatocyte
(c) Spermatogonial stem cells
(d) Primary spermatocyte
(e) Spermatid

1. c-d-b-a-e
2. c-a-d-b-e
3. a-b-c-d-e
4. c-d-a-b-e

Q.

Arrange the following events of spermatogenesis.

I. The spermatogonia gives rise to 4 Primary spermatocytes (2n)

ii. The spermatogonia divides mitotically to maintain the germ cells (2n)

Iii. Spermiogenesis

Iv. Each primary spermatocyte gives rise to 2 secondary spermatocytes(n)

1. ii, i, iv, iii

2. iii, i, ii, iv

3. ii, iii, i, iv

4. iii, ii, i, iv

Q. Study the image related to spermatogenesis and name the hormones involved at each stage of the following flow chart.

1. 1 - GnRH, 2 - LH, 3 - FSH
2. 1 - GnRH, 2 - LH, 3 - Testosterone
3. 1 - LH, 2 - FSH, 3 - GnRH
4. 1 - FSH, 2 - LH, 3 - GnRH

Q. How many sperms are produced from first spermatocyte?

1. 4
2. 2
3. 8
4. 1