Question
Write two differences between spermatogenesis and oogenesis.
✓
Answer
| S. No. | Spermatogenesis | Oogenesis |
| (i) | It is the process of formation of haploid spermatozoa from diploid male germ cells of the testes. | It is the process of formation of haploid ova from the gamete mother cells (oogonia) in the ovary. |
| (ii) | It occurs in testes. | It occurs in ovaries. |
| (iii) | A primary spermatocyte divides to form two secondary spermatocytes by meiosis I. | A primary oocyte divides by meiosis I to form one secondary oocyte and a polar body. |
| (iv) | Spermatogonia changes to primary spermatocyte. | Oogonia changes to primary oocyte. |
| (v) | A secondary spermatocyte divides to form two spermatids by meiosis II. | A secondary oocyte divides by meiosis II to form ovum and a polar body. |
| (vi) | No polar body is formed. | Polar bodies are formed. |
| (vii) | Four spermatozoa are produced from one primary spermatocyte. | One ovum/ egg is produced from one primary oocyte. |
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Answer the following questions:
At which stage of life does gametogenesis begin in human male and female respectively?
At which stage of life does gametogenesis begin in human male and female respectively?
Answer the following questions:
Where is morula formed in humans? Explain the process of its development from zygote.
Where is morula formed in humans? Explain the process of its development from zygote.
Study the illustration given and answer the questions that follow:
Observe the representation of genes involved in the lac operon given below:
- Identify the region where the repressor protein will attach normally.
- Under certain conditions repressor is unable to attach at this site. Explain.
- If repressor fails to attach to the said site what products will be formed by z, y and a?
- Analyse why this kind of regulation is called negative regulation.
How does a chromosomal disorder differ from a Mendelian disorder?
How are Mendelian inheritance, polygenic inheritance and pleiotropy different from each other?
Compare and contrast the advantages and disadvantages of production of genetically modified crops.
One of the main objectives of biotechnology is to minimise the use of insecticides on cultivated crops. Explain with the help of a suitable example how insect resistant crops have been developed using techniques of biotechnology.
Explain how xerarch succession progresses from serie to mesic condition and forms a stable climax community. You may use a flow chart.
Describe the structure of human sperm.###Describe the structure of sperm with suitable diagram. Also define supermatogenesis.