Biology Assignment for Class 12. We covered all the Biology Assignment for Class 12 MCQs in this post for free so that you can practice well for the exam.
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Biology Assignment Objective for Class 12 Students
Who is responsible for the sex determination of a child?
(a) Father
(b) Mother
(c) Both (a) and (b)
(d) None of the above
Option a – Father
Chromosomes can be counted best in
(a) Metaphase
(b) Early prophase
(c) Mid prophase
(d) Late prophase
Option a – Metaphase
An increase in age decreases
(a) crossing over
(b) linkage
(c) polyploidy
(d) mutations
Option a – crossing over
Genes present on Y-chromosomes are called
(a) holandric genes
(b) basic genes
(c) pleiotropic genes
(d) polygenic genes
Option a – holandric genes
Sex determination by environmental factors is commonly observed in
(a) Drosophila melanogaster
(b) Mirabilis jalapa
(c) Melandrium album
(d) Bonellia Viridis
Option d – Bonellia Viridis
By which combination of chromosomes will a child be male?
(a) X from male and X from female
(b) X from male and Y from female
(c) Y from male and X from female
(d) Y from male and Y from female
Option c – Y from male and X from female
The strength of the linkage between two genes is
(a) proportionate to the distance between them
(b) inversely proportionate to the distance between them
(c) dependent on the chromosomes
(d) dependent on the size of chromosomes
Option b – inversely proportionate to the distance between them
Linkage and crossing over are
(a) the same phenomena
(b) different phenomena
(c) opposite phenomena
(d) identical phenomena
Option c – opposite phenomena
Genes are made up of
(a) nucleic acids
(b) proteins
(c) carbohydrates
(d) lipids
Option a – nucleic acids
The cancer-causing gene is
(a) protooncogene
(b) oncogene
(c) transposon
(d) mutable gene
Option b – oncogene
Who among the following was awarded the Nobel Prize for the artificial synthesis of nucleic acids?
(a) Ochoa, Kornberg, and HG Khorana
(b) Jacob and Monod
(c) Gierer and Schwann
(d) Hershey and Aunt Julia
Option a – Ochoa, Kornberg, and HG Khorana
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