Which of the following are used to define the | vedclass

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(A) karyotype is the complete set of chromosomes in an organism,or the individual set of chromosomes of a species.It is defined by the following chara

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$1$,$2$ and $3$ are correct

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(A) karyotype is the complete set of chromosomes in an organism,or the individual set of chromosomes of a species.It is defined by the following characteristics:$1$. The number of chromosomes: Each species has a characteristic diploid number of chromosomes.$2$. The chromosome length: The relative size of each chromosome is a key feature.$3$. The positions of the centromeres: The location of the centromere (metacentric,submetacentric,acrocentric,or telocentric) helps in identifying specific chromosomes.Therefore,all three factors are used to define the karyotype of a species.

List-$I$	List-$II$
$(a)$ Metacentric chromosome	$(I)$ Centromere situated close to the end forming one extremely short and one very long arm
$(b)$ Acrocentric chromosome	$(II)$ Centromere at the terminal end
$(c)$ Sub-metacentric	$(III)$ Centromere in the middle forming two equal arms of chromosomes
$(d)$ Telocentric chromosome	$(IV)$ Centromere slightly away from the middle forming one shorter arm and one longer arm

Which of the following are used to define the karyotype of a species?
$1$. The number of chromosomes
$2$. The chromosome length
$3$. The positions of the centromeres

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Which of the following are used to define the karyotype of a species?$1$. The number of chromosomes$2$. The chromosome length$3$. The positions of the centromeres