GS Biology Questions and Answers
GS Biology questions with answers enhance your general science knowledge, especially for exams like SSC, Railways, and UPSC. Biology is an important branch of general science that deals with the study of life, organisms, and their vital processes. These general science questions and answers cover topics such as cells, human anatomy, genetics, and ecology — frequently asked in competitive exams. Practicing these questions helps you understand biological concepts clearly and boosts your score in the general awareness section. Strengthen your science fundamentals and prepare effectively for multiple-choice questions in upcoming tests.
GS Biology
Showing 10 of
357 questions
311. If a dihybrid pea plant heterozygous for flower colour (red dominant) and seed shape (round dominant) undergoes selfing, types of gametes produced are:
- 2
- 4
- 8
- 16
312. The crossing of a homozygous tall plant with a dwarf yields plants in the ratio:
- Two tall and two dwarf
- One homozygous tall, one homozygous dwarf and two heterozygous tall
- All homozygous dwarf
- All homozygous tall
313. Blue eye colour in humans is recessive to brown eye colour. Expected offspring from crossing blue-eyed woman with brown-eyed man with blue-eyed mother are likely:
- All blue-eyed
- Three blue-eyed and one brown-eyed
- All brown-eyed
- One blue-eyed and one brown-eyed
314. The genotype of a dominant parent is determined by crossing with the recessive parent. This cross is called:
- Back cross
- Test cross
- Long cross
- Out cross
315. Chromosome theory of heredity was postulated by
- Charles Darwin
- Gregor Mendel
- Sutton and Boveri
- Har Gobind Khorana
316. Continuity of germplasm theory by WEISMANN was proposed in
- 1838
- 1883
- 1865
- 1859
317. Allosomes are
- Bead-like structures on chromosomes
- Sex chromosomes
- Rounded bodies
- Node-like structures on chromosomes
318. Mechanical tissues are very poorly developed in
- xerophytes
- halophytes
- hydrophytes
- lithophytes
319. Desert can be converted into green land by
- halophytes
- psammophytes
- tropical trees
- oxylophytes
320. Mangrove plants show vivipary. This is
- germination of seeds within fruits while still attached to parent plant
- germination of seeds in fruits on the soil
- germination of seeds within fruit on sterile artificial culture medium
- germination of seeds only after dispersal of fruits