Cytotaxonomy includes the study of:
I. Chromosome number
II. Number of observable characteristics
III. Chromosomal behaviour
IV. Chromosome morphology

Only II and III

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Only I, III and IV

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Only I, II and IV

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Only I and II

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Solution

The correct option is B Only I, III and IV
Cytotaxonomy is the classification of organisms based on cytological characters like chromosome number, morphology and chromosomal behaviour during meiosis between different taxons. Based on the position of centromere in the chromosome, there are different types of chromosomes. Also, cytotaxonomy is one of the aids used for phylogenetic classification when it’s difficult to find fossils.

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Q. In human males all the chromosomes are paired perfectly except one. This/these unpaired chromosomes is/are :
(i) large chromosome
(ii) small chromosome
(iii) Y chromosome
(iv) X chromosome

(a) (i) and (ii)
(b) (iii) only
(c) (iii) and (iv)
(d) (ii) and (iv)

Q. Cytotaxonomy includes the study of:
I. Chromosome number
II. Number of observable characteristics
III. Chromosomal behaviour
IV. Chromosome morphology

Q. Select the correct option:

_______ is the best stage to count the number and study the morphology of chromosomes.

Question 6
In human males, all the chromosomes are paired perfectly except one. This/these unpaired chromosome is/are

(i) Large chromosome
(ii) Small chromosome
(iii) Y-chromosome
(iv) X-chromosome

(a) (i) and (ii)
(b) (iii) only
(c) (iii) and (iv)
(d) (ii) and (iv)

Q. Chromosomal morphology (structure) is best observed at

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Tools that Aid Phylogenetic System Of Classification

Standard XII Biology

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Cytotaxonomy includes the study of: I. Chromosome number II. Number of observable characteristics III. Chromosomal behaviour IV. Chromosome morphology

Cytotaxonomy includes the study of:
I. Chromosome number
II. Number of observable characteristics
III. Chromosomal behaviour
IV. Chromosome morphology