Which of the following variations in chromosome number is not correctl

1.	Which of the following variations in chromosome number is not correctly paired?(a) Aneuploidy –2n ± 1 chromosomes(b) Monosomy –2n − 1 chromosomes(c) Trisomy –2n + 1 chromosomes(d) Tetrasomy –2n + 4 chromosomes
Answer» Answer is : (d) Tetrasomy – 2n + 4 chromosomes The option (d) is not correctly paired. In aneuploidy, an organism gains or loses one or more chromosomes but not a complete set. In tetrasomy (2n + 2), there is gain of 2 chromosomes. Aneuploid condition 2n - 1 is called monosomic. The aneuploid 2n + 1 is called trisomic.

Which of the following variations in chromosome number is not correctly paired?(a) Aneuploidy –2n ± 1 chromosomes(b) Monosomy –2n − 1 chromosomes(c) Trisomy –2n + 1 chromosomes(d) Tetrasomy –2n + 4 chromosomes

Answer»

Answer is : (d) Tetrasomy – 2n + 4 chromosomes

The option (d) is not correctly paired. In aneuploidy, an organism gains or loses one or more chromosomes but not a complete set. In tetrasomy (2n + 2), there is gain of 2 chromosomes. Aneuploid condition 2n - 1 is called monosomic. The aneuploid 2n + 1 is called trisomic.

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Which of the following variations in chromosome number is not correctly paired?(a) Aneuploidy –2n ± 1 chromosomes(b) Monosomy –2n − 1 chromosomes(c) Trisomy –2n + 1 chromosomes(d) Tetrasomy –2n + 4 chromosomes

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