MCQs Plant Breeding and Genetics-47 Posted on 2025-11-16Author admin 0 1. Which of the following pairs is correct? Mustard – Spike Corn – Raceme Wheat – Capitulum Grass – Panicle 2. A population with low heterozygosity is likely to have __________ Greater adaptive potential High gene flow Reduced fitness and resilience Low mutation rates 3. Genetic drift contributes to loss of heterozygosity at a rate inversely proportional to __________ Selection pressure Mutation rate Population size Gene flow 4. Rhizobia are bacteria that live in the roots of leguminous plants, where they play a crucial role in _________ Nitrogen fixation Water absorption Nutrient uptake Pathogen defense 5. Hybrid vigor is most often observed in the __________ generation. Parental F1 F3 F2 6. Genetic load increases when __________ Heterosis occurs Gene flow increases Mutation rate exceeds selection rate Deleterious mutations are efficiently removed 7. Hybrid vigor (heterosis) results when __________ Homozygous alleles increase Mutation rate decreases Offspring have higher fitness than parents due to heterozygosity Deleterious alleles accumulate 8. _________ is the female inflorescence of maize Tassel Cob Spikelet Spadix 9. Inbreeding depression is typically more severe in __________. Small, isolated populations Large, genetically diverse populations Recently founded populations Hybrid populations 10. _________ is the male inflorescence of maize Spikelet Spadix Cob  Tassel Loading …
