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DNA

The hereditar...

Question

The hereditary units are :
a. Segments of RNA.
b. Genes.
c. Chromosomes.
d. Chromatin.

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Solution

The hereditary units are Genes.
Genes carry information which determines the morphology, physiology, general behavior and all other characteristics of an organism.

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Q. Chromosomes contain hereditary units called as

Chromosomes contain genetic information while chromatin network is devoid of genetic material.

Complete the following sentences by choosing the appropriate words from the brackets.

(Inheritance, sexual reproduction, asexual reproduction, chromosomes, DNA, RNA, gene)

a. Hereditary characters are transferred from parents to offsprings by ............, hence they are said to be structural and functional units of heredity.

b. Organisms produced by ............ show minor variations.

c. The component which is in the nuclei of cells and carries the hereditary characteristics is called .............

d. Chromosomes are mainly made up of .............

e. Organisms produced through ............ show major variations.

Q. Spirally-coiled double strands are observed in
(a) DNA
(b) chromosome
(c) RNA
(d) chromatin

Q. Match the terms to these definitions.
Centromere, centrosome, chromatin, chromosome, spindle, cell cycle, karyotype, meiosis, mitosis, sister chromatids, interphase, metaphase
.......... One of two genetically identical chromosome units that are the result of DNA replication.

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