MIUN Free NEET Quiz Unit 7

1. Mutation, defined as a change in genetic material, can involve a single base pair in DNA (point mutation), such as in sickle-cell anemia, caused by a single base change in the gene coding for the beta chain of haemoglobin.

2. Selective breeding in human history began long before the scientific understanding of sexual reproduction.

3. They can study all the genes in a genome, for example, all the transcripts in a particular tissue or organ or tumor, or how tens of thousands of genes and proteins work together in interconnected networks to orchestrate the chemistry of life.

4. Nucleic acids, which are not long polymers of nucleotides, do not serve essential functions in storing and transferring genetic information.

5. Similar proteins in dissimilar organisms performing similar functions is an example of convergent evolution.

6. Genetics is a branch of biology which deals with principles of inheritance and its practices.

7. In bacteria, each operon has its specific operator and specific repressor.

8. Other phenomena like habitat fragmentation and genetic drift may accentuate these variations leading to appearance of new species and hence evolution.

9. Eye of the octopus and of mammals are an example of analogous structures and for divergent evolution.

10. Eye of the octopus and of mammals are an example of homologous structures and for divergent evolution.

11. Based on dihybrid cross observations, Mendel proposed that something was being unstably passed down, changed, from parent to offspring through the gametes, over successive generations.

12. Genetics deals with the inheritance, as well as the variation of characters from parents to offspring.

13. Genes are the unit of inheritance.

14. Understanding mutations has aided in the study of genetic disorders.

15. The operator region is not adjacent to the promoter elements in most operons.

16. Fossils discovered in Bhimbetka in 1891 revealed Homo erectus lived about 15 mya, had a cranial capacity of 650cc, probably ate meat.

17. Circle symbol in a pedigree tree, represents a male.

18. In male honey bee, n = 16 and sperm contains 16 chromosomes.

19. DNA replication does not follow a semiconservative model, and complementary hydrogen bonding does not guide the process.

20. In bacteria, the transcribed mRNA is immediately functional and can be directly translated.

21. Sahiwal cows in Punjab is an example of domestication.

22. Lemur is a marsupial mammal.

23. First human-like being, the hominid, was called Ramapithecus.

24. Lemur is a placental mammal.

25. Mendel used the term ‘factors,’ now we call them as genes.

26. Mouse is similar to Marsupial mouse.

27. Morgan found a way to map the genes on the chromosomes.

28. The Mendel’s laws were extended in the form of ‘Chromosomal Theory of Inheritance.’

29. Many genes were linked to sexes also and called as sex-linked genes.

30. In phenylketonuria patients, tyrosine is accumulated.

31. In case of the character of seed shape, R is used for the round trait and r for the ‘wrinkled,’ and R and r are alleles of each other.

32. DNA from a single cell is enough to perform DNA fingerprinting analysis.

33. The operator region is not adjacent to the promoter elements in all operons.

34. Flippers of Penguins and Dolphins are anatomically dissimilar structures, though they perform similar functions.

35. Alfred Malthus, a naturalist who worked in the Archipelago, had also come to conclusions similar to Darwin around the same time.

36. Early human (8000 – 1000 B.C.) know about variation.

37. The offsprings are non-identical to their parents.

38. The strength of linkage between w and m is lower than y and w.

39. In bacteria, multiple genes are not often organized together and regulated as units called operons.

40. Alfred Wallace, a naturalist who worked in the Malay Archipelago, had also come to conclusions similar to Darwin around the same time.

41. The universe is a speck.

42. Considering the size of the universe, the solar system is indeed a speck.

43. Dusts are the part of the galaxy.

44. The DNA fragment’s’ sequences were then arranged not based on the overlapping regions present in them.

45. Pod shape is a character.

46. During Mendel’s investigations into inheritance patterns, it was for the first time that statistical analysis and mathematical logic were applied to problems in biology.

47. Elephant always gives birth only to a baby elephant and not some other animal.

48. The Human Genome Project, a large-scale endeavour, did not aim to sequence every base in the human genome and has not provided a wealth of new information.

49. Similar genes in similar organisms performing dissimilar functions is an example of divergent evolution.

50. The diversity of life forms on Earth has remained static over millions of years.