MEDIUM
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Fill in the blank with the correct option given in the bracket.

The set of basic chromosomes present in an organism is called (monosomy/monoploidy).

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Important Questions on Inheritance and Variation

EASY
The mechanism that causes a gene to move from one linkage group to another is called:
HARD

Match the following lists:

  List I   List II
A) Change in single base pair of DNA I) Recombination
B) Deletions of base pairs of DNA II) Genetic map
C) Generation of non-parental gene combination III) Point mutations
D) The frequency of recombination between gene pairs on the same chromosome IV) Frame-shift mutations

The correct match is

EASY
The chromosomes in which centromere is situated close to one end are:
MEDIUM

Match List - I with the List - II.

  List - I   List - II
(a) Metacentric chromosome (i) Centromere situated close to the end forming one extremely short and one very long arms
(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 chromosomes (iv) Centromere slightly away from the middle forming one shorter arm and one longer arm

Choose the correct answer from the options given below:

MEDIUM
The movement of a gene from one linkage group to another is called:
EASY
The shorter and longer arms of a submetacentric chromosome are referred to as:
EASY
When the centromere is situated in the middle of two equal arms of chromosomes, the chromosome is referred as:
EASY

Fill up the blanks with suitable words, respectively. 

Each chromosome has a ____ or _____ on the sides, disc shaped structure is called _____. The _____ chromosome has two equal arms, ____ chromosome has one shorter and one long arm. _____ chromosome has no second arm. The secondary constriction develop small fragment called ______

A) metacentric
B) telocentric
C) centromere
D) primary constriction 

E) submetacentric
F) satellite
G) kinetochore

EASY

Identify the part labelled as ‘M’ in the diagram given below:

Question Image

EASY
The telomeres of eukaryotic chromosomes consists of short sequences of