Test Preparation on Genetics – II Biology Test Series for NEET - 2020
The name chromatin was coined by
Which of the following is the correct sequence of units of
genetics arranged in descending order of size
(a) Gene → Cistron → Muton → Recon
(b) Gene → Muton → Cistron → Recon
(c) Gene → Recon → Cistron → Muton
(d) Gene → Cistron → Recon → Muton
Centromere is a part of chromosome which helps in the
(c) Centromere joins the microtubules of chromosomal
spindle fibres and helps in the movement of chromosome
during cell division. Centromere also plays an important
role in the polymerization of tubulin protein used in the
formation of microtubules. Hence it is helpful in attaching
the chromosome with spindle fibres.
The chromosome number in meiocyte is 34. The organism
could be
Number of autosomes in human sperm is
(b) Sperm is haploid structure inwhich twenty two
autosome and one X or Y chromosome are present.
The long and short arms of chromosome are designated
respectively as
An unfertilized human egg contains
(d) Unfertilized human egg is haploid structure in which 22
autosome and one X chromosome are present.
The structure of the chromosome to which spindle fibre is
attached is
(b) Centromere is a region of chromosomes which holds sister
chromatids together and the area where chromosome are
attached to spindle fibres during cell division.
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