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प्रश्न
"The chromosomal number of the sexually producing parents and their offspring is the same." Justify this statement.
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उत्तर
The first step in sexual reproduction is gamete formation. In this step, the number of chromosomes gets halved. Thus, each gamete receives half the number of chromosomes to that of somatic cells. During fertilisation, the fusion of male and female gametes takes place, which results in the number of chromosomes in the zygote to be equal to that of somatic cells. Thus, the chromosomal number of the sexually producing parents and their offspring is the same.
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संबंधित प्रश्न
Mention the changes a flower undergoes after fertilisation.
What is the function of a flower?
Name the part of a seed which grows into root.
In tobacco plant, the male gametes have 24 chromosomes.
What is the number of chromosomes in the zygote?
The length of pollen tube depends on the distance between :
(a) pollen grain and upper surface of stigma
(b) pollen grain on upper surface of stigma and ovule
(c) pollen grain in anther and upper surface of stigma
(d) upper surface of stigma and lower part of style
__________ is present in unisexual flower.
Write the functions of sepals
The 3-celled egg apparatus at the micropylar end comprises of ______
The ovaries of different flowers may contain ______.
State the number of sets of chromosomes present in a zygote.
