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Learn Biology MCQs [Page 1 of Department 19]

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Ram Sharma • 188.81K Points
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4) What is the ratio of homozygous plants for both dominant characters in F2 of a Dilybrid cross ?

(A) 1/16
(B) 3/16
(C) 4/16
(D) 9/16
Correct Answer - Option (D)

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Ram Sharma • 188.81K Points
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5) Which of the following is significance of dominance ?

(A) Organisms with dominant genes are more vital
(B) Harmful mutations are not expressed due to dominant gene
(C) Heterosis is due to dominant gene
(D) All the above
Correct Answer - Option (B)

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Ram Sharma • 188.81K Points
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6) From a single ear of corn, a farmer planted 200 kernels which produced 140 tall & 40 short plants. The genotypes of these off springs are most likely.

(A) TT ,tt
(B) TT , Tt , tt
(C) TT ,Tt
(D) Tt ,tt
Correct Answer - Option (A)

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Ram Sharma • 188.81K Points
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7) A useful process for determining whether an individual is homozygous
or heterozygous is

(A) cross - breeding
(B) self fertilization
(C) Back - crossing
(D) Test cross
Correct Answer - Option (B)

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Ram Sharma • 188.81K Points
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8) Heterozygous tall plants were crossed with dwarf plants what will be the
ratio of dwarf plants in the following progency ?

(A) 50%
(B) 25 %
(C) 75%
(D) 100%
Correct Answer - Option (A)

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Ram Sharma • 188.81K Points
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9) Genetic recombinations occur through

(A) Mitosis & fertilization
(B) Mitosis & Meiosis
(C) Meiosis & fertilization
(D) None
Correct Answer - Option (C)

No Explanation found. Add Explanation and get +2 points.

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