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  4. In apple, the chromosome number of gametes is 17. What is the chromosome number in its Primary Endosperm Nucleus (PEN) ?

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Q. In apple, the chromosome number of gametes is $17$. What is the chromosome number in its Primary Endosperm Nucleus (PEN) ?

KCETKCET 2020

Solution:

The apple plant is an angiosperm plant. The gametes are haploid cells and PEN in angiosperms is triploid. Thus, if the number of chromosomes in gametes is $17$ , then thrice the number is seen in PEN. Therefore, the number of chromosomes in the PEN is $17 \times 3=51$.