MCQs Plant Breeding and Genetics-50 Posted on 2025-11-16Author admin 0 1. The law of independent assortment results from ———– Mutation Random orientation of homologous chromosomes at metaphase I Random fusion of gametes Crossing over 2. Homologous chromosomes move to opposite poles during ———– Metaphase I Anaphase I Anaphase II Telophase I 3. The total number of possible gamete combinations from independent assortment in an organism with 3 pairs of chromosomes is ———– 8 6 3 12 4. Which phase of mitosis is most similar to meiosis II? Anaphase Telophase Prophase Metaphase 5. Crossing over is a genetic process, where exchange of genetic material occurs between ———– Non-sister chromatids of homologous chromosomes Sister chromatids of the same chromosome Homologous centromeres Telomeres only 6. The key event distinguishing meiosis I from mitosis is ———— Cytokinesis Synapsis and crossing over Chromosome condensation DNA replication 7. Sister chromatids separate during ————- Prophase II Anaphase II Metaphase I Anaphase I 8. Synaptonemal complex, which forms between homologous chromosomes during prophase I of meiosis, is mainly composed of ———- DNA Lipids RNA Proteins 9. Mustard gas was first identified as a chemical mutagen in experiments on __________. Arabidopsis thaliana Drosophila melanogaster E. coli Neurospora crassa 10. Segregation of alleles occurs because —— Crossing over occurs Homologous chromosomes separate Sister chromatids separate DNA replicates Loading …