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Jkbose 12th Zoology Previous Year Solved Paper | Pdf Available
In this article I will provide you Jkbose class 12th Zoology Previous Year Solved Paper Pdf For more strong preparation.
SECTION-A (1 Mark Each – Answer in 1 line)
1. Which one is found in males only?
👉 Y-Chromosome
2. Name the evolutionary man with brain capacity 900 C.C.
👉 Homo erectus
3. The Trisomic condition is represented as:
👉 (A) 2X + 1
4. The causative agent of Filariasis is:
👉 Wuchereria bancrofti
5. Providing a functional gene to overcome a defective gene (Substitute one word):
👉 Gene therapy
✍️ SECTION-B (2 Marks Each – Answer in 20–30 words)
6. Write down the functions of oxytocin hormone in human females.
👉 Oxytocin causes uterine contractions during childbirth and helps in milk ejection from mammary glands during breastfeeding.
7. Write short note on adaptive radiation.
👉 Adaptive radiation is the evolution of different species from a common ancestor in response to different environmental conditions, like Darwin’s finches on Galápagos Islands.
8. How is sex determined in Human beings?
👉 Sex is determined by the type of sperm fertilizing the ovum. X-bearing sperm leads to female (XX), Y-bearing sperm leads to male (XY).
9. What do you mean by Biosafety issues?
👉 Biosafety issues refer to the risks and regulations associated with the use of genetically modified organisms and biotechnology to protect health and environment.
10. Give the applications of genetically engineered insulin.
👉 Genetically engineered insulin is used to treat diabetes. It is identical to human insulin and reduces allergic reactions compared to animal-derived insulin.
📘 SECTION-C (3 Marks Each – Answer in 100– 120 Words)
11. With the help of diagram explain the microscopic anatomy of Testis.
👉 The testis is composed of seminiferous tubules where spermatogenesis occurs. These tubules are lined with germ cells and Sertoli cells. Leydig cells, located in the interstitial spaces, produce testosterone. The seminiferous tubules connect to the rete testis, which leads to the epididymis. The testis is enclosed in a protective covering called tunica albuginea. Diagram Required
12. Write short note on Gene flow and Genetic drift.
👉 Gene flow is the transfer of genetic material between populations, increasing genetic diversity. Genetic drift is the random change in allele frequencies, especially in small populations, which can lead to loss of genetic variation over time.
13. Write a short note on Turner's Syndrome.
👉 Turner’s Syndrome is a chromosomal disorder in females where one X chromosome is missing (XO). Affected individuals are short in stature, have underdeveloped ovaries, and may be infertile. They often lack secondary sexual characteristics and may have heart or kidney defects.
14. Write a short note on Drug abuse.
👉 Drug abuse is the excessive and harmful use of drugs for non-medical purposes. It leads to addiction, physical and mental health problems, and social issues. Commonly abused drugs include heroin, cocaine, alcohol, and prescription medications.
15. How sexual diseases can be prevented?
👉 Sexual diseases can be prevented by practicing safe sex using condoms, limiting the number of sexual partners, regular medical checkups, and spreading awareness about STDs and their transmission.
🧬 SECTION-D (5 Marks – Answer in 150–200 words)
16. Explain the need of Reproductive Health. Also add a note on medical termination of pregnancy.
👉 Reproductive health refers to the well-being of the reproductive system and its functions. It ensures safe sex practices, fertility regulation, maternal health, and prevention of sexually transmitted diseases. Good reproductive health promotes family planning, reduces infant and maternal mortality, and empowers individuals to make informed decisions.
Medical Termination of Pregnancy (MTP) is the legal termination of pregnancy under medical supervision. It is allowed in cases of rape, risk to the mother’s health, or fetal abnormalities. MTP helps prevent unsafe abortions and protects women’s reproductive rights. It must be performed in authorized medical institutions to ensure safety and legality.
OR
Describe human male reproductive system with the help of diagram.
👉 The male reproductive system includes: Testes: Produce sperm and testosterone. Epididymis: Stores and matures sperm.Vas deferens: Transports sperm. Seminal vesicles & Prostate gland: Add fluids to form semen. Urethra: Conducts semen and urine out of the body. Penis: Organ for copulation. The system ensures production, maturation, and delivery of sperm during reproduction. Diagram
