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Question
Which one of the following generates new genetic combinations leading to variation?
Which one of the following generates new genetic combinations leading to variation?
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Solution
The correct option is D Sexual reproduction
The sexual reproduction brings about variation through genetic recombinations. Genetic recombination occurs in non-homologous chromosomes during crossing over of pachytene stage in meiotic cell division.
Nucellar polyembryony - In this condition, nucellar tissue which surrounds the megagametophyte can produce additional embryos (polyembryony), which are genetically identical to the parent plant.
Vegetative propagation - is also called asexual reproduction. Growing plant from a part of a plant and it is genetically same as the parent plant.
Parthenogenesis is a form of reproduction in which an egg can develop into an embryo without the process of fertilisation.
The sexual reproduction brings about variation through genetic recombinations. Genetic recombination occurs in non-homologous chromosomes during crossing over of pachytene stage in meiotic cell division.
Nucellar polyembryony - In this condition, nucellar tissue which surrounds the megagametophyte can produce additional embryos (polyembryony), which are genetically identical to the parent plant.
Vegetative propagation - is also called asexual reproduction. Growing plant from a part of a plant and it is genetically same as the parent plant.
Parthenogenesis is a form of reproduction in which an egg can develop into an embryo without the process of fertilisation.
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