9 49. The most significant adaptive advantage of sexual reproduction is that it a. may be a lot of fun b. allows to combine genes of two or more individual organisms c. reduces by half the parental numbers of chromosomes in offsprings d. may prevent the expression of recessive alleles of one of the parents in the offspring e. introduces variation into genetic make up of offspring 50. Modern studies of many disorders (like Marfan syndrome) have demonstrated that silent mutations a. result in the production of the same protein due to the redundancy of the genetic code and therefore never have effect on phenotype b. may sometimes result in the production of abnormal amount of the same protein due to changes in the speed of transcription and alternative RNA splicing c. may sometimes result in the production of abnormal amount of the same protein due to changes in the translation control mechanisms d. b and c above e. are not possible to observe in humans
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1A) What do Mendel's 3:1 ratios tell us? Select one: a. that natural selection is true. b. that recombination is rare. c. that blending inheritance is false. d. that mutation is common. e. that genetic experiments are misleading. 1B) Which of the following could cause natural selection (cause one trait to spread in population relative to alternative traits)? Select one: a. a predator's hunting strategy b. the physical attributes of food c. climate d. preferences of the opposite sex e. All of the above are correct. 1C) Which of the following is a true statement? Select one: a. Even if a new allele would be adaptive, natural selection cannot create it. b. Children with the same two parents are likely to be genetically identical; their differences are largely environmental. c. Sex cells (eggs and sperm) have twice as many genes as the adults who produced them. d. Mixing together of maternal and paternal genetic material during meiosis is pathological and produces maladaptive outcomes. e. None of the above is true.
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What is the main advantage of sexual reproduction over asexual reproduction? A It is more efficient at producing offspring. B Two parents can invest resources in offspring. C It allows for more competition. D It increases genetic variation among offspring.
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Which of the following is a biological advantage of sexual reproduction? a. In sexual reproduction, the parent organism does not have to perform specialized mating behaviours. b. Sexual reproduction allows for species to adapt to changing environments. c. Sexual reproduction results in heredity that is invariable, as every generation is genetically identical to the generation before them. d. In sexual reproduction, the parent organism does not have to seek out a mate.
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