PHYSICAAll simulations · Class 12 · Zoology
Class 12 Zoology simulations
15 free interactive Class 12 Zoology simulations covering 6 NCERT chapters, including Human Health and Disease, Biotechnology and its Applications, Human Reproduction. Change the variables, watch the result, and learn for school exams, JEE Main and NEET.
Human Health and Disease (3 simulations)
- Structure of an antibody — Rotate an antibody molecule: two heavy and two light chains form a Y with two antigen-binding sites.
- Primary and secondary immune response — Meet an antigen once, then again later. Memory cells make the second (secondary) response faster and much…
- Life cycle of Plasmodium (malaria) — Trace Plasmodium through its two hosts: humans (asexual stages) and the female Anopheles mosquito (sexual…
Biotechnology and its Applications (2 simulations)
- Bt cotton: how the Bt toxin works — Bollworm larvae feed on Bt and non-Bt cotton. In the alkaline gut the inactive protoxin becomes an active…
- Genetically engineered insulin — Build human insulin from its A and B chains, the way recombinant DNA technology produced it in 1983.
Human Reproduction (3 simulations)
- From zygote to implantation — Follow the embryo down the fallopian tube as it cleaves into a morula and a blastocyst, then implants in the…
- Spermatogenesis vs oogenesis — Compare how many gametes form from one primary spermatocyte and one primary oocyte.
- Menstrual cycle: ovary, uterus and hormones — Move through a 28-day cycle and watch follicle growth, ovulation, the corpus luteum and the uterine lining.
Biotechnology: Principles and Processes (3 simulations)
- Agarose gel electrophoresis — Load DNA fragments into wells and run the gel. Negatively charged DNA moves towards the anode; smaller…
- Polymerase chain reaction (PCR) — Cycle through denaturation, primer annealing and extension. Each cycle (ideally) doubles the DNA.
- Making recombinant DNA — Cut a plasmid and foreign DNA with the same restriction enzyme, join them, transform bacteria and pick out…
Evolution (3 simulations)
- Genetic drift in small populations — Let allele frequencies change by chance alone in populations of different sizes. Small populations drift…
- Hardy–Weinberg equilibrium and selection — Start with allele frequencies p and q. Without disturbance they stay constant; add selection against aa and…
- Natural selection on a trait — Apply stabilising, directional or disruptive selection to a population and watch the trait distribution…
Reproductive Health (1 simulations)
- Population growth and doubling time — Choose a growth rate and see how fast a population doubles — the reason reproductive health matters.