FBQ1: In quantitative inheritance, it has been shown that a trait is controlled by ______  Answer: Multiple genes FBQ2: Male bees (drones) develop by _______________ from unfertilized eggs.  Answer: Parthenogenesis FBQ3: A condition where a pair of chromosomes failed to separate during cell division is described as ______________ Answer: Non-disjunction FBQ4: A male that possess female characteristics externally shows a condition known as ______________ Answer: Testicular feminisation FBQ5: An organism producing two different types of sperms is said to be ________   Answer: Heterogametic sex FBQ6: An individual with genes that express themselves regardless of whether they are recessive or dominant is said to be_____________   Answer: Hemizygous FBQ7: A situation where a grandfather transmits his X chromosome to his grandson through his daughter is referred to as ______________ Answer: Crisscross FBQ8: A dark staining body in the interphase nucleus of most female somatic cell is called__________  Answer: Barr body   FBQ9: The gene that is transmitted from father to the son only is described as ____________ Answer: Holandric gene FBQ10: ________________ are the genes that are present in both sexes but only express themselves in one sex  Answer: Sex-limited traits FBQ11: Gametogenesis involves ____________ and __________________ Answer: Oogenesis, spermatogenesis FBQ12: The sex cell which produces only one type of gamete is described ______________ Answer: Homogametic cell FBQ13: The members of different gene pairs failed to recombine at random at the time of segregation during gamete formation. True or False?  Answer: False FBQ14: Variations in the number of individual chromosomes which give unbalanced set of chromosome is known as ______  Answer: Aneuploidy FBQ15: The factors which are transmitted from parent to offspring were first called gene by -------- Answer: Mendel FBQ16: According to chromosome theory, different chromosomes carry the same genes. True or False Answer: False FBQ17: In which year did Hertvig and Straburger advanced the theory that the cell nucleus must contain the hereditary materials?  Answer: 1885 FBQ18: The ratio of the different genotypes among the progeny of a cross is referred to as ____.  Answer: Genotypic ratio FBQ19: --------------------- process bring about an equal distribution of the nuclear materials important for the physiological and developmental process of the cell  Answer: Mitotic FBQ20: A cross in which the parents differ with respect to only one trait controlled by only one gene is known as ______.  Answer: Monohybrid Cross FBQ21: According to ______, there is a segregation of alleles such that only one member of a pair enters the gamete. Answer: Mendel FBQ22: During the formation of gametes, the two alleles of a given gene assort independently on non-homologous chromosomes. A statement of which of the Mendel’s law? Answer: second law of inheritance FBQ23: When there are n-pairs of chromosomes, how many types of gametes can be produced during meiotic cell division?  Answer: 2n types of gametes FBQ24: When an unbiased coin is tossed the probability that it will come up heads is______ Answer: ½ FBQ25: What is the probability that if a coin is tossed, it shall get either a head or a tail? Answer: The probability is 1 FBQ26: When two alleles are identical, the genotype is said to be _____________ Answer: Homozygous FBQ27: Probability is applicable to genetics when considering Mendel’s __________ of inheritance  Answer: Second law FBQ28:  When small phenotypic classes are so small that they are not sharply distinguishable; this is called __________ Answer: Continuous variation FBQ29: The probability of occurrence in one trial of either of two mutually exclusive events is the sum of Probability of individual _______________ Answer: occurrence FBQ30: The phenotypic expression of an organism is entirely attributable to the environment. True or False?  Answer: False FBQ31: The first significant breakthrough on the problem of quantitative inheritance was by ______ in 1909 Answer: Nilsson-Ehle FBQ32: If two heterozygotes are crossed, the number of -------------- is larger than the number of phenotypic classes wherever the number of loci at which they differ is greater than one. Answer: genotypic classes FBQ33: If we assume that four loci are involved in skin colour in man; A1, B1, C1 and D1 alleles contributing to pigment production while A2, B2, C2 and D2 are non- contributing A marriage between pure black and pure white individuals would produce mulatto children with intermediate skin colour. What will be their genotype? Answer: A1 A2 B1 B2 C1 C2 D1 D2 FBQ34: In 1891 a German biologist called __________ observed that in certain insects, the nuclei of half of the sperm contain an extra structure. Answer: Hermann Henking FBQ35: One of the most clear cut pieces of evidence illustrating sex-linked inheritance was reported by Morgan in 1910 from crosses with __________  Answer: Drosophila melanogaster MCQ1: Who stated that million, million spermatozoa All of them alive? Answer: Aldous Huxley MCQ2: Which year was the term genetics coined? Answer: 1906 MCQ3: The hereditary factor was called gene by --------------- Answer: Johannsen MCQ4: Who theorised that small representative of elements of all parts of the parental body are concentrated in the semen Answer: Hippocrates MCQ5: Which year was hereditary factor called gene? Answer: 1909 MCQ6: Who advanced the theory that the father’s semen provides the plans according to which the amorphous blood of the mother is to be shaped into the offspring? Answer: Aristotle MCQ7: In which century was AURA SEMINALIS first mention? Answer: 17th Century MCQ8: Which theory stated that either the egg or sperm contains the entire organism in a miniaturised but perfect form? Answer: Preformation theory MCQ9: Who stated that adult parts arise as a result of a gradual transformation or differentiation of embryonic tissues into increasingly specialised tissues? Answer: Karl Ernst Von Baer MCQ10: Who thought that mysterious vital forces were responsible for what he thought was a de novo origin of adult parts. Answer: Wolff MCQ11: Which theory was proposed to replace the theory of pangenesis? Answer: Theory of Germplasm MCQ12: Who proposed the theory of Germplasm? Answer: August Weismann MCQ13: Which of these scientists was not involved in the description of the process of fertilisation which includes the fusion of the egg and the sperm nuclei? Answer: Fleming Van Beneden MCQ14: --------- and ------------ developed the theory that the nucleus contains hereditary materials Answer: Hertwig and Strasburger MCQ15: Who postulated that offspring receives two particles one from each parent but exhibits only one? Answer: Pierre-Louis Maupertuis MCQ16: ----------- stated that adult parts arise as a result of a gradual transformation or differentiation of embryonic tissues into increasingly specialised tissues Answer: Karl Ernst Von Baer MCQ17: Which year did Mendel publish his result after he reported it at a Natural science meeting? Answer: 1866 MCQ18: Study in U.S showed that ------------ to --------- male births are affected by Klinelfelter’s syndrome Answer: 1/200 to 1/400 MCQ19: Which of these chromosomes is not Klinefelter male? Answer: XXXX MCQ20: Which theory stated that either the egg or sperm contains the entire organism in a miniaturised but perfect form? Answer: Preformation theory MCQ21: The sugars and phosphates in nucleic acids are connected to each other in Answer: phosphodiester bond. MCQ22: The sub-microscopic units which control the life processes of cell is called Answer: Gene MCQ23: What is polyspermic embryo? Answer: It is an embryo fertilised by more than one sperm MCQ24: The effect of dispermy is Answer: Production of four asters in the zygote  MCQ25: How many blastomeres are formed in the first division of dispermic zygote? Answer: 4 MCQ26: Which of these is not a consequence of polyspermic embryo? Answer: Four centrioles are introduced into the egg MCQ27: Who discovered that the abnormal development of dispermic embryo was the result of the erratic chromosome distribution? Answer: Boveri MCQ28: Apart from Non-disjunction of chromosomes, one of the following is a cause of TRISOMY condition. Answer: Trans-location MCQ29: Cell theory was credited to --------------- Answer: Schleiden and Schwann MCQ30: Establishment of comparative biochemistry was in the year Answer: 1940 MCQ31: In what year was the alga Spirogyra described? Answer: 1674 MCQ32: The cell was first discovered and named by ­­­­­­­­­­­­­­­­­­­­­­­­­­__________________ Answer: Robert Hooke MCQ33: Cell was discovered in Answer: 1665 MCQ34: Which of these statements about cells is not correct? Answer: Cells form by free cell formation, similar to the formation of crystals   MCQ35: Who stated that “All cells arise from preexisting cells’’ Answer: Rudolph Virchow