Bio-110 T3

Front 1

The ___ is the most commonly found in nature.

Back 1

Wild-type trait

Front 2

What crosses of allelies will only produce heterozygous offspring?

Back 2

AAx aa

Front 3

The backbone of DNA consists of

Back 3

A repeating sugar-phosphate-sugar-phosphate pattern

Front 4

The recombination frequency between gene B and gene C is 11%. The recombination frequency between gene B and gene D is 5%. The recombination frequency between gene C and gene D is 15%. What would be the arrangement of these genes on a linkage map?

Back 4

DBC

Front 5

In humans, the presence or absence of dimples is a trait controlled by a single gene. What is the genotype of an individual who is heterozygous for dimples

Back 5

Dd

Front 6

The correct sequence of stages in mitosis is

Back 6

Prophase, Metaphase, Anaphase, Telophase

Front 7

Amanda's abnormal number of sex chromosomes resulted from

Back 7

Nondisjunction

Front 8

With respect to her sex chromosomes, Amanda would be designated as

Back 8

XO

Front 9

An individual who is homozygous

Back 9

Carriers two copies of teh same allele for a gene

Front 10

Janice's genotype is

Back 10

WW or Ww

Front 11

Mary has the genotype

Back 11

Ww

Front 12

If one strand of a DNA double helix has the sequence GTCCAT, what is the sequence of the other strand?

Back 12

CAGGTA

Front 13

How many nucleotides make up a codon?

Back 13

Three

Front 14

Who discovered the structure of DNA?

Back 14

Watson and Crick

Front 15

The chromosomes of eukaryotic cells are found in the

Back 15

Nucleus

Front 16

A mutation within a gene that will insert a premature stop codon in MRNA would

Back 16

Result in a shortened polypeptide chain

Front 17

What chromosomes belong to a normal human male?

Back 17

44 autosomes, one X chrosome, and one Y chromosome

Front 18

Where is translation accomplished?

Back 18

Ribosomes

Front 19

Red-green color blindness is inherited as a sex-linked recessive trait. The gene is found on the X chromosome. How can a man with normal color vision father a daughter who is red-green color-blind?

Back 19

He can't (unless there is a mutation)

Front 20

What type of chemical bond joins the bases of complementary DNA strands?

Back 20

Hydrogen

Front 21

During metaphas

Back 21

Chromosomes line up in the middle of the cell

Front 22

After replication

Back 22

Each new DNA double helix consists of one old strand and one new strand

Front 23

Homologous chromosomes

Back 23

Carry genes controlling the same inherited characteristics

Front 24

A Karyotype (a chromosome display) would be unable to determine

Back 24

Eye color

Front 25

A mating between a purebred purple-flowered pea plant and a purebred white-flowered pea plant would produce a(n)

Back 25

Hybrid

Front 26

Attached earlobes are recessive to free earlobes. What genotypic ratio is expected when an individual with attached earlobes mates with an individual heterozygous for free earlobes?

Back 26

1:1

Front 27

HIV (human immunodeficiency virus) must use its own ___to reproduce.

Back 27

Reverse transcriptase

Front 28

A duplicated chromosome consists of two

Back 28

Sister chromatids

Front 29

One difference between mitosis and meiosis is

Back 29

Mitosis produces cells genetically identical to the parent cell, but meiosis does not

Front 30

What is the ultimate source of all diversity?

Back 30

Mutation

Front 31

What enzyme is responsible for RNA synthesis?

Back 31

RNA polymerase

Front 32

If a strand of DNA has the sequence AAGCTC, transcription will result in a(n)

Back 32

RNA strand with the sequence UUCGAG

Front 33

A purebred plant that produces yellow seeds is crossed with a purebred plant that produces green seeds. The seeds of all the offspring are yellow. Why?

Back 33

The yellow allele is dominate to the green allele.

Front 34

Alleles are described as

Back 34

Alternate versions of a gene

Front 35

What event occurs during anaphase?

Back 35

Sister chromatids separate

Front 36

The shape of a DNA molucle is most like

Back 36

A twisted rope ladder

Front 37

How can bacteriophage DNA be spread from cell to cell without causing cell death?

Back 37

Via a lysogenic cycle

Front 38

The codon AGC codes for the amino acid

Back 38

Serine

Front 39

In humans, free earlobes (E) are dominate to attached earlobes (e) and the presence of freckles (F) is dominate to the absence of freckles (f). If an individual heterozygous for both of these traits were to mate with an individual with attached earlobes and no freckles, what is the probability of having a child with attached earlobes and freckles?

Back 39

25%

Front 40

In a DNA double helix, adenine pairs with ___ and guanine pairs with ___.

Back 40

Thymine...Cytosine

Front 41

What characteristic is seen in prophase I that does not occur in prophase II?

Back 41

Crossing over occurs

Front 42

Hypophosphathemia (vitamin D-resistant rickets) is inherited as a sex-linked dominate trait. The relevant gene is found on the X chromosome. What is the expected outcome of a cross between a homozygous recessive woman and a man with hypophosphatemia?

Back 42

All of their daughters and none of their sons exhibit hypophosphatemia

Front 43

The cell cycle results in the production of

Back 43

Two cells, each with the same amount of genetic material and the same genetic infomration

Front 44

Sexual intercourse in humans

Back 44

Allows a haploid sperm cell to fertilize a haploid egg cell.

Front 45

What is the difference between a benign and a malignant tumor?

Back 45

Benign tumors do not metastasize; malignant tumors do.

Front 46

A couple has two female children. What is the probability that their next child will be male?

Back 46

50%

Front 47

The expressed (coding) regions of eykaryotic genes are called

Back 47

exons

Front 48

RNA contains the nitrogenous base ___ instead of ___, which is only found in DNA.

Back 48

Uracil...Thymine

Front 49

What is the key to the recognition of incomplete dominance?

Back 49

The phenotype of the heterozygote falls between the phenotypes of the homozygoes.

Front 50

The correct sequence of the events occurring during transcription is

Back 50

Initiation, elongation, termination

Front 51

An individual with (naturally) curly hair and an individual with (naturally) straight hair mate; all of their offspring have (naturally) wavy hair. What is the relationship between the alleles for hair texture?

Back 51

Incomplete dominance

Front 52

An individual with (naturally) curly hair and an individual with (naturally) straight hair mate; all of their offspring have (naturally) wavy hair.If an individual with wavy hair mates with an individual with straight hair, what is the probability that their child will have curly hair?

Back 52

0%

Front 53

A(n) ___ is an example of an organism that can sometimes reproduce asexually by parthenogensis.

Back 53

Komodo dragon

Front 54

Linked genes are usually

Back 54

Located close together on a chromosome

Front 55

Achondroplasia is a form of dwarfism caused by a dominate allele. The homozygous dominant genotype causes death, so individuals who have this condition are all heterozygotes. If a person with achondroplasia mates with a person who does not have achondroplasia, what percentage of their children would be expected to have achondroplasia?

Back 55

50%