U4: CHROMOSOMES BASED ON CENTROMERE POSITION

Question 1

Centromere is centrally located or in the middle, yielding arms of roughly equal length

Answer 1

Metacentric

Question 2

Pairs of metacentric chromosomes in human

Answer 2

5

Question 3

1st chromosome

Answer 3

Metacentric

Question 4

3rd chromosome

Answer 4

Metacentric

Question 5

16th chromosome

Answer 5

Metacentric

Question 6

19th chromosome

Answer 6

Metacentric

Question 7

20th chromosome

Answer 7

Metacentric`

Question 8

1st, 3rd, 16th, 19th, 20th chromosome

Answer 8

Metacentric

Question 9

Shape of spindle fiber in Metacentric

Answer 9

V-shaped

Question 10

Centromere is off-center, q arm is longer and shorter p arm, has unequal length of chromosome arms

Answer 10

Submetacentric

Question 11

Shape of spindle fiber in Submetacentric

Answer 11

J-shaped

Question 12

2nd chromosome

Answer 12

Submetacentric

Question 13

4th chromosome

Answer 13

Submetacentric

Question 14

7th chromosome

Answer 14

Submetacentric

Question 15

12th chromosome

Answer 15

Submetacentric

Question 16

17th chromosome

Answer 16

Submetacentric

Question 17

18th chromosome

Answer 17

Submetacentric

Question 18

2nd, 4th to 12th, 17th, 18th, X chromosome

Answer 18

Submetacentric

Question 19

Pairs of submetacentric chromosomes in human

Answer 19

13

Question 20

X chromosome

Answer 20

Submetacentric

Question 21

The centromere is very close to one end, yielding a small p arm

Answer 21

Acrocentric

Question 22

This means peak

Answer 22

acro

Question 23

Often associated with satellites encoding rRNA

Answer 23

Acrocentric

Question 24

Pairs of acrocentric chromosomes in human

Answer 24

5

Question 25

13th chromosome

Answer 25

Acrocentric

Question 26

14th chromosome

Answer 26

Acrocentric

Question 27

15th chromosome

Answer 27

Acrocentric

Question 28

21th chromosome

Answer 28

Acrocentric

Question 29

22nd chromosome

Answer 29

Acrocentric

Question 30

Y chromosome

Answer 30

Acrocentric

Question 31

13th to 15th, 21st, 22nd, Y chromosome

Answer 31

Acrocentric

Question 32

Centromere is found at the end of chromosome, no p arm exists

Answer 32

Telocentric

Question 33

T/F: Telocentric chromosomes are sometimes normally found in humans.

Answer 33

False cancer cells, mice and rodents

Question 34

Plants that contain telocentric chromosomes

Answer 34

Oxalis - Shamrock

Question 35

This scientists determined the ratio of p and q arms for each chromosome type.

Answer 35

Levan et al

Question 36

M/m

Answer 36

Metacentric

Question 37

1.0-1.6/1.7

Answer 37

Metacentric

Question 38

Sm

Answer 38

Submetacentric

Question 39

3.0

Answer 39

Submetacentric

Question 40

St

Answer 40

Subtelocentric

Question 41

3.1-6.9

Answer 41

Subtelocentric

Question 42

T

Answer 42

Acrocentric

Question 43

7.0

Answer 43

Acrocentric

Question 44

T, Not applicable

Answer 44

Telocentric

Question 45

Formula for Arm Ratio

Answer 45

Q arm divided by P arm

Question 46

T/F: Telomeres and centromeres are only present in eukaryotic cells.

Answer 46

True

Question 47

This is the tip of each chromosome with tandem repeats of a hexameric sequence.

Answer 47

Telomere

Question 48

Hexameric sequence, does not code for any information

Answer 48

TTAGGG

Question 49

Term for the hexameric sequence

Answer 49

Overhang

Question 50

Nucleotides in telomere

Answer 50

50-400 nucleotides

Question 51

Where are telomeres often compared to?

Answer 51

aglets of shoelaces

Question 52

Functions of Telomere

Answer 52

1. Preventing abnormal end-to-end fusion of chromosomes 2. Protecting the ends of chromosomes from degradation 3. Ensuring complete DNA replication 4. Having a role in chromosome pairing during meiosis

Question 53

Function of telomere in early meiosis

Answer 53

anchoring chromosomes to inner membrane, homologous chromosome pairing

Question 54

T/F: Longer telomeres, longer life span.

Answer 54

True

Question 55

Found in the end of telomere, lengthens it and has a role in inactivation.

Answer 55

Telomerase

Question 56

This refers to the limited cellular division.

Answer 56

Hayflick limit / Hayflick model