Principles of Inheritance & Variation PYQs Set 4 (PDF)

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Mere Teacher · Previous Year Questions NEET Biology · Principles of Inheritance & Variation · Set 4 (Q91-120)
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91. $How many true breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?$ (1) $8$ (2) $4$ (3) $2$ (4) $14$ 92. $Broad palm with single palm crease is visible in a person suffering from-$ (1) $Thalassemia$ (2) $Down's syndrome$ (3) $Turner's syndrome$ (4) $Klinefelter's syndrome$ 93. $Select the correct statement from the ones gives below with respect to dihybrid cross :$ (1) $Genes loosely linked on the same chromosome show similar recombination as the tightly linked ones$ (2) $Tightly linked genes on the same chromosome show very few recombinations$ (3) $Tightly linked genes on the same chromosome show higher recombination$ (4) $Genes far apart on the same chromosome show very few recombinations$ 94. $Which of the following statements is not true of two genes that shows 50 per cent recombination frequency?$ (1) $The genes may be on different chromosomes.$ (2) $The genes are tightly linked.$ (3) $The genes show independent assortment.$ (4) $If the genes are present on the same chromosome, they undergo more than one crossovers in every meiosis$ 95. $Which one of the following symbols represents mating between relatives in human pedigree analysis?$ (1) (2) (3) (4) 96. $Represented below is the inheritance pattern of a certain type of traits in humans. Which one of the following conditions could be an example of this pattern$ (1) $Haemophilia$ (2) $Thalassemia$ (3) $Phenylketonuria$ (4) $Sickle cell anaemia$ 97. $Study the pedigree chart of a certain family given in figure and select the correct conclusion which can be drawn for the character.$ (1) $The female parent is heterozygous.$ (2) $The parents could not have had a normal daughter for this character.$ (3) $The trait under study could not be colour blindness.$ (4) $The male parent is homozygous dominant.$ 98. $In the following human pedigree, the filled symbols represent the affected individuals. Identify the type of given pedigree.$ (1) $X-linked dominant$ (2) $Autosomal dominant$ (3) $X-linked recessive$ (4) $Autosomal recessive$ 99. $Study the pedigree chart given below :- What does it show :-$ (1) $Inheritance of a recessive sex-linked disease like haemophilia$ (2) $Inheritance of a sex-linked inborn error of metabolism like phenylketonuria$ (3) $Inheritance of a condition like phenylketonuria as an autosomal recessive trait$ (4) $The pedigree chart is wrong as this is not possible$ 100. $Test cross in plants or in Drosophila involves crossing$ (1) $Between two genotypes with recessive trait$ (2) $Between two F_{1} hybrids$ (3) $The F_{1} hybrid with a double recessive genotype$ (4) $Between two genotype with dominant trait$ 101. $Select the correct match.$ (1) $Thalassemia - X linked$ (2) $Haemophilia - Y linked$ (3) $Phenylketonuria - Autosomal dominant trait$ (4) $Sickle cell anaemia - Autosomal recessive trait, chromosome-11$ 102. $Genetic drift operates in :-$ (1) $Non-reproductive population$ (2) $Slow reproductive population$ (3) $Small isolated population$ (4) $Large isolated population$ 103. $Select the correct statement :$ (1) $Franklin Stahl coined the term "linkage".$ (2) $Punnett square was developed by a British scientist.$ (3) $Spliceosomes take part in translation.$ (4) $Transduction was discovered by S. Altman.$ 104. $A gene showing codominance has:$ (1) $Alleles tightly linked on the same chromosome$ (2) $Alleles that are recessive to each other$ (3) $Both alleles independently expressed in the heterozygote$ (4) $One allele dominant on the other$ 105. $The best example for pleiotropy is :-$ (1) $Skin colour$ (2) $Phenylketoneuria$ (3) $Colour Blindness$ (4) $ABO Blood group$ 106. $true breeding plant is$ (1) $Produced due to cross-pollination among unrelated plants$ (2) $Near homozygous and produces offspring of its own kind$ (3) $Always homozygous recessive in this genetic constitution$ (4) $One that is able to breed on its own$ 107. $Alleles are:$ (1) $Different phenotype$ (2) $True breeding homozygotes$ (3) $Different molecular forms of a gene$ (4) $Heterozygotes$ 108. $The best example for pleiotropy is:$ (1) $Phenylketonuria$ (2) $Colour Blindness$ (3) $ABO Blood group$ (4) $Skin colour$ 109. $Multiple alleles are present :$ (1) $At different loci on the same chromosome$ (2) $At the same locus of the chromosome$ (3) $On non-sister chromatids$ (4) $On different chromosomes$ 110. $Select the incorrect statement.$ (1) $Male fruit fly is heterogametic.$ (2) $In male grasshoppers, 50% of sperms have no sex-chromosome.$ (3) $In domesticated fowls sex of progeny depends on the type of sperm rather than egg.$ (4) $Human males have one of their sex chromosome much shorter than the other.$ 111. $A test cross is carried out to$ (1) $Predict whether two traits are linked.$ (2) $Assess the number of alleles of a gene.$ (3) $Determine whether two species or varieties will breed successfully.$ (4) $Determine the genotype of a plant at F_{2} .$ 112. $Multiple alleles are present$ (1) $On different chromosomes$ (2) $At different location in the same chromosome$ (3) $At the same locus of the chromosome$ (4) $On non-sister chromatids$ 113. $A pleiotropic gene:$ (1) $Is a gene evolved during Pliocene$ (2) $Controls a trait only in combination with another gene$ (3) $Controls multiple traits in an individual$ (4) $Is expressed only in primitive plants$ 114. $The term "linkage" was coined by :$ (1) $W.Sutton$ (2) $T.H. Morgan$ (3) $T.Boveri$ (4) $G.Mendel$ 115. $A true breeding plant is :$ (1) $near homozygous and produces offspring of its own kind$ (2) $always homozygous recessive in its genetic constitution$ (3) $one that is able to breed on its own$ (4) $produced due to cross-pollination among unrelated plants$ 116. $A pleiotropic gene :$ (1) $controls multiple traits in an individual$ (2) $is expressed only in primitive plants$ (3) $is a gene evolved during Pliocene$ (4) $controls a trait only in combination with another gene$ 117. $Alleles are :$ (1) $true breeding homozygotes$ (2) $different molecular forms of a gene$ (3) $heterozygotes$ (4) $different phenotype$ 118. $A test cross is carried out to :$ (1) $assess the number of alleles of a gene.$ (2) $determine whether two species or varieties will breed successfully.$ (3) $determine the genotype of a plant at F_{2}$ (4) $predict whether two traits are linked.$ 119. $Sickle cell anemia is :-$ (1) $Characterized by elongated sickle like RBCs with a nucleus$ (2) $An autosomal linked dominant trait$ (3) $Caused by substitution of valine by glutamic acid in the beta globin chain of haemoglobin$ (4) $Caused by a change in a single base pair of DNA$ 120. $Which one of the following is the most suitable medium for culture of Drosophila melanogaster ?$ (1) $Moist bread$ (2) $Agar-agar$ (3) $Ripe banana$ (4) $Cow dung$