1. Number of DNA strand found at each pole in a mitocyte of onion during anaphase is
a. 16 b. 8 c. 32 d. 64
2. Number of metaphasic plates found in metaphase of a Haplopappus mitocyte with 4 chromosome
a. 4 b. 8 c. 1 d. 2
3. Spindle fibres are made up of
a. polypeptides.
b. Biomacromolecules.
c. Hetero polymer.
d. All of the above
4. percentage of DNA transferred to daughter cell from S - phase of a meiocyte is
a. 50% b. 100%
c. 75% d. 25%
5. The meiotic spindle assembled to prepare to separate homologous chromosome or chromatids during
a. Diskinesis
b. prophase - ll
c. Telophase -ll
d. Both a and b
6. The stage of Meiosis which is evidence for mendalian law of segregation.
a. Metaphase - I
b. Prophase - II
c. Metaphase - ll
d. Anaphase - l
Answers
1st AnSwer :-
Number of DNA strand found at each pole in a mitocyte of onion during anaphase is
(a) 16
(b) 8
☑ (c) 32
(d) 64
Option (c) 32 is right
Explaination :-
In Onion each pole during anaphase has 16 chromosomes means 16 DNA molecules that is 32 DNA strands.
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2nd AnSwer :-
Number of metaphasic plates found in metaphase of a Haplopappus mitocyte with 4 chromosome
(a) 4
(b) 8
☑ (c) 1
(d) 2
Option (c) 1 is right
Explaination :-
Metaphase has only one metaphasic plate irrespective of chromosomes number.
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3rd AnSwer :-
Spindle fibres are made up of
(a) polypeptides.
(b) Biomacromolecules.
(c) Hetero polymer.
☑ (d) All of the above
Option (d) all of the above is right
Explaination :-
A spindle is made up of tubulin protein .A protein is a polypeptides/heteropolymer/ Biocromolecules
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4th AnSwer :-
percentage of DNA transferred to daughter cell from S - phase of a meiocyte is
(a) 50%
(b) 100%
(c) 75%
☑ (d) 25%
Option (d) 25% is right
Explaination :-
From phase of mitocyte daughter cell recive 50% of DNA, but in S phase DNA is doubled. So from S - phase each daughter cell receive only 25% DNA.
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5th AnSwer :-
The meiotic spindle assembled to prepare to separate homologous chromosome or chromatids during
(a) Diskinesis
(b) prophase - ll
(c) Telophase -ll
☑ (d) Both a and b
Option (d) both a and b is right.
Explaination :-
The meiotic spindle assembled in diskinesis to prepare for the seperation of homologous chromosomes in anaphase - l and assembled in Prophase - ll to separate chromatids in anaphase - ll
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6th AnSwer :-
The stage of Meiosis which is evidence for mendalian law of segregation.
(a) Metaphase - I
(b) Prophase - II
(c) Metaphase - ll
☑ (d) Anaphase - l
Option (d) Anaphase - l is right
Explaination :-
Segregation of chromosomes occurs in anaphase - l of Meiosis.