TMA3/BIO403

TMA Quiz Questions TMA: TMA3/BIO403 SCORE=10.00 BIO403 - Population Genetics Dr. Chukwu Maureen (mchukwu@noun.edu.ng ) 1 In males, the genotypic frequencies will be same as those of the ____ in the population Gene pool Gene flow Alleles recombinants 2 Which of the following is altered by deviations from random mating in population genetics? gene pool genetic frequencies allelic frequencies genetic drift 3 Which of the following forms of genetic drift occurswhen a population is initially established by a small number of breeding individuals? Found Effect Bottle neck effect Point effect Small population 4 In which of the following condition(s) is genetic drift frequent? I/ populations occupy marginal habitats, II. competitio for resourses limit population growth, III. there is rapid gene flow. I only II only I and III I and II 5 Which of the following phenotypes is the universal reciepient in the ABO blood group system? A B AB O 6 Suppose that in apopulation of 100,000 people carrying the recessive allele a foralbinism, there are 100 aa albinos and 1800 Aa hetrozygous carriers, How many of the hetrozygous carriers will be in the next generation? 98,010 10 1980 9820 7 Almost all mathematical foundations of genetics changes in populations were developed during: I. 1920s, II. 1930s, III. 1940s I and II II and III I and III all of the above 8 If 57% of pupils in a population have black hair, what is the frequency of black hair in the population? 0.43 0.57 0.47 0.53 9 Which of the following is not involved in bottle neck effect? Disaster War Migration Accident 10 Which of the following forms of genetic drift occurs when a population is drastically reduced in size Bottle neck effetc Small populations Founder effect Point effect 11 Which of the following factors does not reduce population size? fluctuating population size Overlapping generations Production of offsprings Migration 12 Population (A) 72 breeding adults, 70 females and 2 males while population (B) with 72 breeding adults equally distributed between males and females___ is the effect of their genetic drift Same in A and B Greater in A than B Greater in B than A None of the above 13 At equillibrum the expected frequency of colour blind males in African Americans is ______ 0.0015 0.0085 0.039 0.061 14 Which of the following is not x linked trait? Clour blindness haemophilia Red-Green colour blindness Ability to roll tongue 15 At what frequency do most allele that cause genetic disease in human occur? very low high higher moderate 16 The following are variations in chromosome structure except__. abbrations deletions replicatiopns inversions 17 Who championed the importance of genetic drift? Wright Morgan Haldane Fisher 18 Which of the followingrefer to random change in the allelic frequency due to chance? Gene flow Mutation gene linked genetic drift 19 Mutation of a dominant gene (A) to a recessive gene (a) is refered to as a ____ mutation Forward derived Reverse Point 20 Which of the following provides the raw genetic materials upon which evolution acts? Mutation Recombination Non disjunction Variation