CHROMOSOMES Flashcards

1
Q

The darkly stained bodi s seen during the metaphase stage of mitosis is?

A

Chromosomes

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2
Q

Who discovered chromosomes?

A

Strasburger in 1875

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3
Q

Who coined the word chromosomes?

A

Waldeyer in 1888

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4
Q

Chromosomes are composed of thin chromatid thread called?

A

Chromonemata

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5
Q

Chromosomes undergoes coiling during?

A

Prophase

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6
Q

Chromosomes of eukaryotic are enclosed by?

A

Nuclear membrane

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7
Q

What is major genetic constituents of chromosomes?

A

Gene

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8
Q

Chromosomes shape is usually observed during?

A

Anaphase

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9
Q

The shape of chromosomes is determined by position of ?

A

Centromere

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9
Q

The shape of chromosomes is determined by position of ?

A

Centromere

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10
Q

Generally chromosomes have 3 shape they are?

A

Rod shape
V shape
J shape

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11
Q

Chromosomes size is measured at?

A

Mitotic metaphase

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12
Q

Plants usually have longer chromosomes than animals ?
True or false

A

True

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13
Q

The maximum size of chromosomes is observed during?

A

Interphase

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14
Q

The localized region of the chromosomes with which fibres are attached during metaphase is known as?

A

Centromere (primary construction)

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15
Q

One of the two distinct longitudinal subunits of chromosomes is called?

A

Chromatid

16
Q

Chromatid get seperated during?

A

Anaphase

17
Q

How is chromatid formed?

A

It formed during the interphase when the chromosomes and DNA replicate

18
Q

The chromosomal region between the secondary constriction and nearest telomere is called?

A

Satellite or trapant

19
Q

The twonwnd of chromosomes is known as?

A

Telomere

20
Q

The chromosomes of some species show small bead like structure Called?

A

Chromomeres

21
Q

Under light microscope, threads like coiled structure are found in the chromosomes and chromatid who h are called?

A

Chromonema

22
Q

A mass of aromatic material in which chromonemata are embedded is called?

A

Matrix

23
Q

The region of chromosome, which takes up deep stain during interphase and prophase is called?

A

Heterochromatin

24
Q

The region of chromosome, which takes up deep stain during interphase and prophase is called?

A

Heterochromatin

25
Q

The region if the chromosomes which takes up little stain during interphase is called?

A

Euchromatin

26
Q

Metacentric chromosomes is?

A

A chromosome in which the centromere located in the middle portion such chromosomes assume V shape at anaphase

27
Q

Sub-metacentric chromosomes is ?

A

A chromosome in which centromere is located slightly away from the centre oimy or has sub media position. Such chromosomes assume J SHAPE at anaphase

28
Q

A chromosome in which the centromere is located very near to one end or has sub-terminal position is called?

A

Acrocentric chromosomes

29
Q

A chromosome in which centromere is located at one end is called?

A

Telocentric