Bio Exam

Front 1

Which occurs in meiosis but not in mitosis?

Back 1

Crossing Over

Front 2

The quantity of DNA in the cells double:

Back 2

Between the G1 and G2 phases of the cell cycle.

Front 3

Crossing over involves the exchange of genetic material between ________.

Back 3

non-sister chromatids of a homolouges pair.

Front 4

Occurs during the Mitotic phase:

Back 4

1) The degradation of the Nucleur membrane.
2) the movement of chromosomes
3) the formation of the mitotic spendle
4) the condensation of chromosomes so that they can be visualized.

Front 5

The disruption of microfilament formation would also interfere with:

Back 5

cleavage furrow formation

Front 6

The function of non-kinecticore microtubules is to:

Back 6

Aid in cytokenises by elongating the cells shape.

Front 7

In animals, somatic cells are produced by _______ and gametes are produced by _____.

Back 7

mitosis, meiosis

Front 8

Reforming of nuclei at both poles, with each nucleoid containing the haploid number of chromosomes but chromotids are stll attatched.

Back 8

Telophase of Meiosis I

Front 9

Tetrads of homolouges straddle the metaphse plate, each member of the pair attatched to different pole's centrosome.

Back 9

Metaphase I of Meiosis I

Front 10

Preparation of materials needed for upcoming division such as replication of centrosomes:

Back 10

G2 phase

Front 11

Reforming of nuclei at both poles, with each nuclei containing the diploid number of chromosomes.

Back 11

Telophase of Mitosis

Front 12

Phase of general cell life, before any decision to divide has taken place.

Back 12

G1 Phase

Front 13

First phase of mitosis

Back 13

Prophase of Mitosis

Front 14

Seperation of sister chromatids that have NOT undergone crossing over, moving them to seperate poles.

Back 14

Anaphase of mitosis.

Front 15

Cell is in non-dividing state

Back 15

G0 phase

Front 16

Crossing over takes place

Back 16

Prophase I of Meiosis

Front 17

Homologous pairs are seperated and pulled to opposite poles:

Back 17

Anaphase I of Meiosis I

Front 18

Seperation of sister chromatids that have undergone crossing over, pulling them to seperate poles.

Back 18

Anaphase II of Meiosis II.

Front 19

Specialized region of the chromosome where the two sister chromatids are attached ; often called the 'waist' of a pair of chromotids.

Back 19

centromere

Front 20

1st sign of division between two daughter cells as cytokenesis begins and and the cell membrane begins to indent

Back 20

cleavage furrow

Front 21

Cells undergoing _________ are in the process of dividing their cell membrane and the cyoplasm within.

Back 21

cytokensis

Front 22

When cells are in Interphase, the cell mixture is a diffuse material of DNA and proteins called _________.

Back 22

chormatin

Front 23

Microtubule fibers radiate out from ________ during Mitosis.

Back 23

centrosomes.

Front 24

Vesicles consisting of cell wall material fuse together, forming a _____, which will eventually become a new cell well between adjacent plant cells.

Back 24

cell plate

Front 25

The cellular structure of Eukaryotic cells that contains genetic material in the form of one long DNA molecule is the ________________.

Back 25

chromosome

Front 26

A 1:2:1 phenotypic ratio in the F2 generation of a monohybrid cross is a sign of:

Back 26

incomplete dominance

Front 27

A true breeding individual would be _____ or _____ for a certain character.

Back 27

homozygous dominant, homozygous receissive

Front 28

Blue feather color is dominant over yellow feather color in parakeets. If you are given a random yellow parakeet, you can be certain its genotype is

Back 28

homozygous recessive.

Front 29

A couple who are both carriers for the gene for cystic fibrosis (a recessive disorder) have two children who
have cystic fibrosis. The couple is about to have another child. What is the chance that all three children willhave cystic fibrosis?

Back 29

1/64

Front 30

The _____________ of an organism describes its physical appearance while its _____________ describes
which alleles it possesses for a particular character.

Back 30

phenotype; genotype

Front 31

In Mendel’s classic monohybrid experiments, the phenotypes of which generation tell you which trait is
dominant?

Back 31

F1

Front 32

Gene at one locus alters phenotypic expression of a gene at a 2nd locus

Back 32

Epistasis

Front 33

One gene effects more than one phenotypic character

Back 33

Pleiotrophy

Front 34

Both alleles manifest themselves phenotypically in offspring

Back 34

Codominance

Front 35

How can you prevent an extra-uterine implantation?
1.
2.

Back 35

• Infection control

• Chiropractic Care

Front 36

Hybrids possess the same phenotype as homozygous dominant individuals

Back 36

Complete dominance

Front 37

A genotype in which the 2 alleles are different

Back 37

Heterozygous

Front 38

More than one gene contributes to a single phenotype

Back 38

Polygenic inheritance

Front 39

Any inherited characteristic

Back 39

Character

Front 40

At least 3 or more alleles are possible

Back 40

Multiple Alleles

Front 41

An individual who is a heterozygote for a recessive disease

Back 41

Carrier

Front 42

Failure of proper separation of homologues or sister chromatids during meiosis

Back 42

Non-disjunction

Front 43

A genotype in which both alleles are identical

Back 43

Homozygous