LAB 1 EXAM (1-4)

Question 1

When looking at the slides under the microscope, they are

Answer 1

inverted and reversed (inversion)

Question 2

total magnification is

Answer 2

ocular lens (10) * objective lens (10,40)

Question 3

locate the nucleus of your cheek cell

Answer 3

dark blue dot in the middle

Question 4

what are the differences between animal and plant cell?

Answer 4

Animal cell is an irregular circular shape and has no cell wall while a plant cell is rectangular shaped and has a cell wall.

Question 5

which objective should always be in place both when beginning to use the microscope, and when putting it away?

Answer 5

the 4x scanning power

Question 6

which objective is in focus at the greatest and safest distance from the slide

Answer 6

10x low power

Question 7

A total magnification of 100 X requires the use of the 10 X ocular lens with which objective?

Answer 7

10*10=100 so 10X low power

Question 8

if the letter E is moved to the right, in what direction does it appear to move in the field of view?

Answer 8

left

Question 9

Microscope is called compound when it has more than one set of what

Answer 9

More than one set of lenses

Question 10

what part of the microscope regulates the amount of light?

Answer 10

the diaphragm, illumination, brightness adjustment knob

Question 11

what word is used to indicate that if the object is in focus at low power it will also be in focus with high power?

Answer 11

Parfocal

Question 12

describe the differences between a compound light microscope, and a dissecting microscope? in what situations would you use a stereoscopic microscope?

Answer 12

a dissecting microscope has two objective lenses for each magnification rather than one. it is mostly used for dissection of specimens.

Question 13

what happens in the stage of prophase?

Answer 13

The nuclear membrane disappears as spindles appear. chromosomes in shape of “u” appear.

Question 14

what happens in the stage of metaphase?

Answer 14

The chromosomes are more visible, and they line up at the equator.

Question 15

what happens at the stage of anaphase?

Answer 15

The chromatids divide and move towards opposite poles so each chromatid consists of one DNA molecule.

Question 16

what happens at the stage of telophase?

Answer 16

The chromosomes are now near the opposite poles. Animal cells form a cleavage furrow since it doesn’t have a cell wall. Plant cells form a cell plate because it has a cell wall.

Question 17

what is the genetic significance of mitosis?

Answer 17

It helps with the growth and repair of different organisms.

Question 18

duration of mitotic stage

Answer 18

(number of cells in a stage/total number of cells)24 hrs 60min/hr

Question 19

describe what happens during interphase

Answer 19

The DNA of the cell is being replicated

Question 20

how is mitosis different in plants and animals?

Answer 20

In telophase, cytokinesis in animal cells begin with a cleavage furrow, dividing the cell into two. cytokinesis in plant cells, form a cell plate because it has a cell wall.

Question 21

what is the definition of phenotype?

Answer 21

Traits that you have

Question 22

what is the definition of genotype?

Answer 22

Combination of two alleles to give you a specific trait

Question 23

if you have a dominant phenotype for any of the above traits, how could you determine your genotype?

Answer 23

Based on both of your parents genotype, you are able to determine your genotype. So if your parents was Rr and Rr, then you’d know your genotype has to either be Rr or RR. Since your phenotype is dominant, you genotype can’t be rr.

Question 24

B- blood type can receive from?

Answer 24

O- and B-

Question 25

why is it necessary to match the donor’s and recipient’s blood before a transfusion?

Answer 25

because if the blood types react, then there could be blood clots, strokes, and other complications

Question 26

what happens to red blood cells that are agglutinated?

Answer 26

They clot up and become cloudy.

Question 27

what is the difference between agglutinogens and agglutinins?

Answer 27

Agglutinogens are antigens on RBCs and agglutinins are antibodies in the plasma.

Question 28

How are ABO blood types determined?

Answer 28

If a persons blood agglutinates with anti A serum, anti B serum, and anti-Rh serum.

Question 29

could a man with an AB blood type be the father of a child with type O blood?

Answer 29

No because a child with type O blood needs ii genotype

Question 30

could a man with an O blood type be the father of a child with type A.B. blood?

Answer 30

No because O blood type has the genotype ii and blood type AB is I^A I^B so it’s not possible.

Question 31

could a type B child with a type a mother have a type a father?

Answer 31

no because she needs at least one I I^B allele