Principles of Inheritance and Variation MCQ Questions & Answers in Botany

131. There are two alleles (A, and A2) out of which one(Aj) has nil abundance in a population then theabundance of second allele (A2) is

A 0.25

B 1.00

C 0.40

D 0.50

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132. When a red grain variety of wheat is crossed with another white grain variety a Fj-hybrid is produced. On self ing of this Ft- hybrid, how many offsprings of F2 - generation resemble phenotypically to it's parents (let grain colour of wheat controlled by three gene pairs

A 2/16

B 20/64

C 15/64

D 2/64

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133. The linkage map of X-chromosome of fruitfly has 66 units, with yellow body gene (y) at one end and bobbed hair (b) gene at the other end

A 60%

B > 50%

C 50%

D 100%

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134. Chromosomes with genes abcdefg becoming abedcfg is

A Duplication

B Deletion

C Translocation

D Inversion

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135. Which one of the following traits of garden pea studied by Mendel, was a recessive feature

A Axial flower position

B Green seed colour

C Green pod colour

D Round seed shape

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136. In Mirabilis jalapa when homozygous red flowered and white flowered plants are crossed, all F: plants have pink coloured flowers. In F2 produced by selfing of Fj plants, red, pink, white flowered plants would appear respectively in the ratio of

A 1:1:2

B 2:1:1

C 1:0:1

D 1:2:1

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137. Gene for colourblindness is located on

A Y chromosome

B 13th chromosome

C X chromosome

D 21th chromosome

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138. How many different kinds of gametes will be produced by a plant having the genotype AABbCC

A Three

B Four

C Nine

D Two

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139. Gene therapy first used in the treatment of

A Albinism

B Haemophilia

C SCID

D LIQID

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140. Select the correct statement from the following

A Darwinian variations are small and directionless and gets selected by nature

B Fitness is the end result of the ability to adapt and gets selected by nature

C All mammals except whales and camels have

D Mutations are random and directionl

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131. There are two alleles (A, and A2) out of which one(Aj) has nil abundance in a population then theabundance of second allele (A2) is

132. When a red grain variety of wheat is crossed with another white grain variety a Fj-hybrid is produced. On self ing of this Ft- hybrid, how many offsprings of F2 - generation resemble phenotypically to it's parents (let grain colour of wheat controlled by three gene pairs

133. The linkage map of X-chromosome of fruitfly has 66 units, with yellow body gene (y) at one end and bobbed hair (b) gene at the other end

134. Chromosomes with genes abcdefg becoming abedcfg is

135. Which one of the following traits of garden pea studied by Mendel, was a recessive feature

136. In Mirabilis jalapa when homozygous red flowered and white flowered plants are crossed, all F: plants have pink coloured flowers. In F2 produced by selfing of Fj plants, red, pink, white flowered plants would appear respectively in the ratio of

137. Gene for colourblindness is located on

138. How many different kinds of gametes will be produced by a plant having the genotype AABbCC

139. Gene therapy first used in the treatment of

140. Select the correct statement from the following

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