Q1. A stock contains 56 chromosomes and scion contain 24 chromosomes. How many chromosomes are present in root and egg cells of the resultant plants respectively?
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The plant part containing strong root system is called stock while the plant part containing better flower, fruit yield is called scion. The chromosome number remains same in root cells, but is reduced to half in egg cell borne in flower. Thus, the root will have 58 chromosomes and egg cell will have 15 chromosomes.
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Explanation:
The chromosome number in the vegetative parts of the scion will be same as the original i.e. 30. However, in gamates; egg cell or pollen the chromosome number will be half of the original plant (in this case scion) so, it will be 15.
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