Test Preparation on Genetics – II Biology Test Series for NEET - 2020
1.
The name chromatin was coined by
2.
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
3.
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.
4.
The chromosome number in meiocyte is 34. The organism could be
5.
Number of autosomes in human sperm is
(b) Sperm is haploid structure inwhich twenty two autosome and one X or Y chromosome are present.
6.
The long and short arms of chromosome are designated respectively as
7.
An unfertilized human egg contains
(d) Unfertilized human egg is haploid structure in which 22 autosome and one X chromosome are present.
8.
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.
