Which of the following defines a genome? A) representation of a complete act of

Question

Which of the following defines a genome? A) representation of a complete act of a cell's polypeptides B) the complete act of an organism's polypeptides C) the complete set of a species' polypeptides D) a karyotype E) the complete set of an organism's genes What do we mean when we use the terms monohybrid cross and dihybrid cross? A) A monohybrid cross involves a Single parent, whereas a dihybrid cross involves two patents. B) A monohybrid cross produces a single progeny, whereas a dihybrid cross produces two progeny C) a dihybrid cross involves organisms that are heterozygous for two characters and a monohybrid cross involves only one. D) A monohybrid cross is performed for one generation, whereas a dihybrid cross is performed for two generations. E) a monohybrid cross results in a 9:3:3:1 ratio whereas a dihybrid cross gives a 3:1 ratio what is the reason that linked genes are inherited together? A) They are located close together on the same chromosome. B) The number of genes in a cell is greater than the number of chromosomes. C) Chromosomes are unbreakable. D) Alleles are paired together during meiosis. E) Genes align that way during metaphase I of meiosis. which of the following is an example of polygenic inheritance? A) pink flowers in snapdragons B) the ABO blood group in humans C) Huntington's disease in humans D) white and purple flower color in peas E) skin pigmentation in humans In his transformation experiments, what did Griffith observe? A) Mutant mice were resistant to bacterial infections. B) Mixing a heat-killed pathogenic strain of bacteria with a living non pathogenic strain can convert some of the living cells Into the pathogenic form. C) Mixing a heat-killed nonpathogenic strain of bacteria with a living pathogenic strain makes the pathogenic strain nonpathogenic. D) Infecting mice with nonpathogenic strains of bacteria makes them resistant to pathogenic strains. E) Mice infected with a pathogenic strain of bacteria can spread the infection to other mice.

Explanation / Answer

25. B - Chargaff Rule A=T and C=G.So option A,C,D,E not possible. Also [A] + [G] = [T] + [C] gives the number of bases present in the genome.

26. A - Histone is a positive charge and it contains positive charge amini acids largely like Lysine and Arginine. DNA is a negative charge.

27. E - A complete set of organisms genes. Polypeptides are proteins so it not be genome.

28. C - Monohybrid uses single characters and dihybrid uses 2 characters.

29. A - 2 genes located close to each other in same chromosome

30. E - Multiple gene involved in pigment of skin

31. B

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