MCQsGenetics-Principles of Inheritance MCQs June 14, 2017 October 2, 2017 Question #1: HbA and HbS alleles of normal and sickle cell haemoglobin are codominant alleles multiple alleles dominant-recessive alleles cumulative allelesQuestion #2: Which of the following changes to a DNA molecule is least likely to result in a deleterious mutation? deletion of a base pair in a coding region change of a base pair in the first codon of a coding region change of the first base pair of a codon change of the third base pair of a codon Question #3: Sometimes chromosome number increases or decreases due to Non-disjunction of chromosome genetic repeats mutagenic change All of these.Question #4: Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/linkage? Down’s syndrome – 44 autosomes + XO Klinefelter’s syndrome – 44 autosomes +XXY Colour blindness – Y-linked Erythroblastosis foetalis – X - linkedQuestion #5: The polygenic genes show Different karyotypes Different genotypes Different phenotypes None of the aboveQuestion #6: Sickle cell anaemia is due to substitution in which instead of valine, glutamic acid is inserted at number 6th position of beta-chain of Hb instead of glutamic acid, valine comes at number 6th position in one of beta-chain of Hb valine is inserted at number 6th position in alpha-chain of Hb glutamic acid is substituted by valine at number 6th position of alpha-chain of HbQuestion #7: In pea plants, the long-stem trait (L) is dominant and the short-stem trait is recessive. Two pea plants were crossed, producing seeds that yielded 165 long-stem plants and 54 short-stem plants. The genotypes of the parent plants were most likely Ll and LL Ll and Ll II and ll LL and II Question #8: If gene frequency between genes a and c is 2%, b and c is 13%, a and b 15%, c and d 17% and a and d 19% , what will be the sequence of these genes in a chromosome a, c, b, d a, b, c, d d, b, a, c a, d, b, cQuestion #9: Multiple alleles occur on: Different loci of homologous chromosomes Same loci of non homologous chromosomes Different loci of non homologous chromosomes Same loci of homologous chromosomesQuestion #10: A haemophilic male marries a normal woman, whose father is also a haemophilic. It is expected that half their children will be haemophilics all the children will be haemophilics one fourth of the children will be haemophilics none of the children will be haemophilicsQuestion #11: Which one of the following individuals can 16 different gametes? Aa Bb cc Dd Aa Bb cc DD Ee Ff Aa Bb Cc dd EE FF Aa Bb Cc DD Ee Ff Question #12: If you cross a diploid individual that is homozygous recessive for a given trait with a heterozygous diploid individual, what is the probability of obtaining with the homozygous recessive phenotype? 25% 50% 75% 0 %Question #13: Which one of the following crosses show 3 : 1 ratio? Aa Bb × Aa Bb aabb × AABb Aabb × Aabb AaBb × aabb Question #14: A cross between a plant having genotype AaBb × aabb do not yield a ratio of 1 : 1: 1 : 1. What can we say? no segregation independent assortment is occurring independent assortment is not seen None of the aboveQuestion #15: A man with blood group A marries a woman having blood group AB. Which of the following blood group in the progeny of this couple would show that the man is heterozygous? O A AB BCongratulations, you passed!I'm sorry but you did not achieve the required score. ALSO WATCH: Mendelian Inheritance, Thalassemia, Polygenic Inheritance, Pedigree Analysis, IN OUR YOUTUBE CHANNEL: simplified Biology Get weekly Biology Notes, MCQs, Mnemonics and Videos:Share this:Click to share on Facebook (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Google+ (Opens in new window)Click to share on Telegram (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Tumblr (Opens in new window)Click to email this to a friend (Opens in new window)Like this:Like Loading...Related Population Interactions – PredationDNA structure Leave a Reply Cancel reply This site uses Akismet to reduce spam. Learn how your comment data is processed.