Bio 1 Final Hurley

Cytokinesis in animal cells involve contraction of a ring of _____ microfilaments

Actin plus myosin

The sources of genetic variation during meiosis are

Crossing over and the random assortment of material and paternal chromosomes

Plant hormones known as _____ stimulate mitosis

Cytokinins

Charge after Turman that DNA from any source contains about the same amount of guanine as

Cytosine

Which of the following causes unwinding of the DNA double helix

DNA helicase

Which of the following statements about DNA is false

DNA is only found in eukaryotic cells

Okazaki fragments are going together by

DNA ligase

Which of the following adds new nucleotides to a girl and DNA chain

DNA polymerase

The bacteria phages used in Alfred Hershey's and Martha Chase'sexperiment showed that

DNA was injected it into bacteria

Meselson and Stahl separated DNA from different generations using

Density gradient centrifugation

A zygote contains the _____ number of chromosomes

Diploid

The range of phenotypic possibilities that can develop from a certain dog genotype under different environmental conditions is called the

Norm of reaction

The formation of female gametes is termed

Oogenesis

In a human cell in prophase I, there are _____ tetrads

23

A couples first child was a girl with cystic fibrosis. What is the chance that their next child will be normal and male

3/8

If a couple is having three children, what is the probability that they will have two girls and one boy

3/8

Which of the following best describes semi conservative replication

A DNA molecule consists of one parental strand and one new strand

A bacterial chromosome consists of

A circular DNA molecule many times larger than the cell

The physical location of a particular gene on chromosome is called

A locus

The 5 end of each Okazaki fragment begins with

A separate RNA primer

To prevent disastrous consequences, the eukaryotic cell is controlled by

A series of cell cycle checkpoints

During prophase I, each chaisma represents

A site of crossing over

Mating an individual expressing a dominant phenotype, but his genotype is unknown, with an individual expressing the corresponding recessive phenotype is an example of

A test cross

A maternal homologue and paternal homologue synapse to form

A tetrad

Mindel's principle of segregation states that

Alleles separate from each other before forming gametes

During which of the following stages of meiosis dothe sister chromatids separate

Anaphase II

A Barr body in a mammalian female cell represents

And inactive X chromosome

Duplicated centrioles move to opposite poles of a dividing _____ cell during _____ of the cell cycle

Animal; prophase

Two chains of DNA must run in _____ directions and must be _____ if they are to bond with each other

Anti-parallel; complementary

The first experimenters to use Griffith's transformation assay to identify the genetic material were

Avery, McLeod, and McCarty

Why does DNA synthesis only proceed in the 5 to 3 dorection

Because DNA polymerases can only add nucleotides to the three end of a poly nucleotide strand

Cancerous cells differ from non-cancerous cells and that the cancerous cells

Can maintain telomere length as they divide

Cytokinesis and plant cells occurs via the formation of a

Cell plate

In prophase, _____ is compacted into visible chromosomes

Chromatin

If meiosis did not occur and sexually repressed producing organisms, then

Chromosome number would double in each generation

If DNA replication rejoin the two parental strands, it would be termed

Conservative

Mismatch repair occurs when

Enzymes remove incorrectly paired nucleotides

I gene that affects, prevents, or masks the expression of a gene at another locus is what type of gene

Epistatic

Nucleosomes are best described as

Eukaryotic DNA associated with histone proteins

Which of the following events does not occur in prophase II

Formation of chaisma

_____ used x-ray diffraction to provide images of DNA

Franklin

Mature nerve cells become arrested and what phase of the cell cycle

G0 phase

The term true breeding refers to

Genetically pure lines

Animal cells are stimulated to divide by mitosis by

Growth factors

Do you and I promise is the enzyme responsible for

I think short strands of RNA at the site of replication initiation

When certain medium height hybrid plants were crossed, they produce offspring that were doors, medium, and tall in a ratio of 1:2:1. This is this is an example of

Incomplete dominance

The cell cycle of a typical somatic cell consist of _____ and M phase

Interfase

A replication fork

Is a Y shaped structure were both DNA strands are replicated simultaneously

If a cell is in G2

It has twice the amount of DNA present in a telophase nucleus

Which of the following statements concerning nucleotide excision repair is false

It is a type of mismatch repair

Why is DNA able to store large amounts of information

It's nucleotides can be arranged in a large number of possible sequences

The chromosome make up of an individual organism is called a

Karyotype

The kinerochore serves which of the following functions

Kinetochores attach to microtubules during mitosis

The DNA strand that is replicated smoothly and continuously is called the

Leading strand

Eukaryotic chromosomes consist of

Linear DNA molecules complexed with positively charged histone proteins

Genes that tend to be inherited together are said to be

Linked

The principle of independent assortment is not true for

Linked genes

Which of the following statements concerning the cell cycle is false

M-Cdk inhibits mitosis

Sporophyte plants produce spores using

Meiosis

Who first confirm that the replication of DNA was semi conservative

Meselson and Stahl

Chromosomes are condensed to the greatest extent during what phase of mitosis

Metaphase

The mitotic spindle is made of

Microtubules

Gametophyte plants produce gametes using

Mitosis

The _____ is responsible for the separation of the chromosomes during _____ of mitosis

Mitotic spindle; anaphase

A particular gene that controls the coat color and peas also determines the susceptibility of these pieces to it particular disease. The situation is referred to as

Pleiotropy

_____ refers to multiple independent pairs of jeans having similar and additive effects on the same characteristic

Polygenic inheritance

During which phase this crossing over occur

Prophase I

Homologous chromosomes undergo synapsis during

Prophase I

Chromosomes are duplicated during what phase of the cell cycle

S-phase

Nucleosome's are organized into large coiled loops held together by

Scaffolding proteins

Which of the following events does not occur in meiosis I

Separation of sister chromatids

The sex of most mammals, birds, and insects is determined by

Sex chromosomes

And replication, once the DNA strands have been separated, reformation of the double helix is prevented by

Single-strand binding proteins

_____ contain identical DNA sequences and are held together by _____ during mitosis

Sister chromatids; centromeres

The information carried by DNA is incorporated in the code specified by the

Specific nucleotide sequence of DNA molecule

The two molecules that alternate to form the backbone of a polynucleotide chain are

Sugar and phosphate

In DNA replication, the lagging strand

Synthesize as a series of Okazaki fragments

The ends of eukaryotic chromosomes can be lengthened by

Telomerase

_____, The ends of eukaryotic chromosomes, shorten with every cell replication event

Telomeres

If the sale is dividing by binary fission then you know that

The cell is prokaryotic

One culture normal human cells were infected with a virus that carried the jeans that code for his subunit of telomerase

The cells under one more cell divisions the normal

I cell is in metaphase if

The chromosomes are aligned in the middle of the cell

How was the chromosome of a bacterial cell replicated

The circular DNA molecules replicated from one origin of replication bidirectionally

The probability that two genes will be separated by crossing over is related to

The distance between the two genes on the chromosome

X-ray diffraction studies are used to determine

The distances between atoms of molecules

All of the following events occur during Prometaphase except

The duplicated chromosomes become visible with the light microscope

The main reason that scientist all the proteins rather than be a night where the carriers of genetic material in the cell was

The large number of possible amino acid combinations

How are the chromosomes of a eukaryotic cell replicated

The linear DNA molecules are replicated for multiple origins of replication bidirectionally

When a DNA molecule containing a wrong base at one location and one strand is replicated

The mutation is copied into one of the two daughter molecules

The final product of DNA replication is

To DNA molecules, each of which contain one new and one old DNA strand

What is the function of nucleosomes?

To prevent DNA strands from tangling

Enzymes called _____ form breaks in the DNA molecules to prevent the formation of knots in the DNA helix during replication

Topoisomerases

A diploid individual has a maximum of _____ different alleles for a particular locus

Two

Calico cats are never male because

Two different X chromosomes are needed for the expression of the calico phenotype what

In genetics, map units express the distance between

Two loci on a chromosome

What is best used to demonstrate the linkage of two genes

Two point test cross

And the experiments of Griffith, the conversation of nonlethal R strain bacteria to lethal S strain bacteria

Was an example of the genetic exchange known as transformation

X-ray crystallography show that DNA

Was at helix

_____ determine the structure of the molecule DNA

Watson and Crick

Which of the following are not produced by meiosis

Zagotes