Fundamentals of Genetics Welcome to your Fundamentals of Genetics 1. Which term represents a pair of contrasting characters? Allelomorphs Homozygous Heterozygous Codominant genes2. A cross was made between tall and dwarf plants. In F1 generation, all plants were tall, when the F1 plants were self pollinated, the tall and dwarf plants appeared in 3:1 ratio in F2 generation. This phenomenon is known as Dominance Segregation Hybridisation Crossing Over3. What is the effect of sexual reproduction? Offspring is weak Offspring is diseased Offspring is more vigorous Offspring is like the parents4. An exception to Mendel's law is Linkage Independent assortment Purity of gametes Dominance5. Mendel's findings were rediscovered by Correns All the above De Vries Tschermark6. Which one of the following is a phenotypic monohybrid ratio in F2 generation? 1:3 3:1 1:2:1 2:27. The alternative form of a gene is Recessive character Allele Dominant character Alternate type8. The crossing of F1 to any of the parent is known as Test cross Back cross F1 cross All of the above9. Which of the following is true about the "Law of Segregation"? Alleles separate from each other during gametogenesis All of the above Law of segregation is the law of purity of gametes Segregation of factors is due to the segregation of chromosomes during meiosis10. DNA structure was discovered by Watson and Crick Mendel H.G.Khurana Lamarck11. Who among the following is called the father of Genetics? Mendel Darwin Watson and Crick Lamarck12. The 9:3:3:1 dihybrid ratio is due to Independent assortment Crossing over Homologous pairing Segregation13. The geometrical device that helps to find out all the possible combinations of male and female gametes is known as Bateson square Punnett square Crick square Mendel square14. Genetics is a branch of Biology dealing with None of these Variation in living beings Both Heredity and Variation Heredity in living beings15. The smallest unit of genetic material which produces a phenotypic effect on mutation is Recon Nucleic acid Muton Gene16. Chromosomal aberrations are caused by Change in the number of chromosomes Change in both the number and arrangement of genes Change in the structure of the gene Change in the arrangement or the position of genes17. When two individuals differing in atleast one character are crossed, the process is known as Selection None Pedigree Hybridisation18. When an individual has both the genes of a contrasting character, it is said to be Heterozygous Genotype Phenotype Homozygous19. Pea plants were used in Mendel's experiments because They were cost effective They had contrasting characters All of the above They were easily available20. The genotypic ratio of a monohybrid cross is 2:1:1 1:2:1 3:1 9:3:3:121 out of 20Please fill in the comment box below.
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