Genes

Front 1

What material in the cell controls the traits of an organism?

Back 1

The chromatin in the cell controls the traits of an organism.

Front 2

What is crossing?

Back 2

Crossing is the process of transferring sperm from what parent to fertilize the egg of another.

Front 3

What is a gene?

Back 3

A gene is a part of a chromosome that controls the traits of an organism.

Front 4

What is the smallest number of genes that controls a trait?

Back 4

One gene pair.

Front 5

When does a hybrid trait result?

Back 5

A hybrid trait appears when the traits of a gene are different.

Front 6

What happens if there is no dominant gene?

Back 6

When there is no dominant gene, the genes are expressed together.

Front 7

what do the 4 boxes of Punnett Square show?

Back 7

THey show every possible combination of gene pairs that an offspring could inherit.

Front 8

If both parent gene pairs are hybrid, what part of the offspring will have the pure traits?

Back 8

The offspring that recieves the pair will have a pure recessive trait.

Front 9

What is heredity?

Back 9

Heredity is the passing of one parent's traits to an offspring.

Front 10

Predict the percentage of offsprings that will have attached earlobes when there is a cross between a pure recessive and a hybrid.

Back 10

50%

Front 11

How are the genes of a population passed on?

Back 11

The genes are passed on in the chromosomes of egg and sperm cells.

Front 12

What is mutation?

Back 12

Mutation is the change in the gene that can cause a new trait to appear.

Front 13

Why is chlorophyll important to a plant?

Back 13

It makes food for the plant.

Front 14

What is the importance of natural selection?

Back 14

Serves the passing of genes that are most adaptive to a particular environment.

Front 15

What processes have brought about changes in the types of organisms on Earth?

Back 15

Adaptation and natural selection.

Front 16

Why is it easier to observe mutation in a bacteria than other organisms?

Back 16

Bacteria can create several generations in an hour.

Front 17

Besides genes, what else may be responsible for an organism's trait?

Back 17

The environment.

Front 18

What are some traits that are selectively bred?

Back 18

Faster growth rate and greater food production.

Front 19

A gene is part of what substance?

Back 19

Each gene is part of a DNA molecule.

Front 20

What is recombinant DNA?

Back 20

DNA made by the movement of genes from one organism into the other.

Front 21

In what type of organism is recombinant DNA used to produce the Hepatitis B vaccine?

Back 21

Yeast

Front 22

Why Black Peppered Moths rare in rural areas of England?

Back 22

They adapted better to the city environment because of pollution changes.

Front 23

What chance is there for a pure recessive trait in a cross between hybrid and a dominant?

Back 23

50%

Front 24

What organisms are used to produce recombinant DNA?

Back 24

Bacteria

Front 25

An inherited characteristic of an organism is a:

Back 25

trait

Front 26

A pair of recessive genes or a pair of dominant genes will produce a:

Back 26

hybrid

Front 27

Passing of traits from parents to offsprings is:

Back 27

heredity

Front 28

The part of chromosomes that controls the traits of an organism is the:

Back 28

gene

Front 29

A gene that controls a hidden trait is:

Back 29

recessive gene

Front 30

A molecule made by the movement of genes from one organism to another to form new combinations.

Back 30

Recombinant

Front 31

A trait that results when a dominant gene is paired with a recessive gene:

Back 31

hybrid

Front 32

The study of how traits are inherited:

Back 32

genetics

Front 33

A gene whose trait is always expressed:

Back 33

dominant

Front 34

The process by which organisms adapt or die is called:

Back 34

natural selection

Front 35

A change in genes that can cause a new trait to appear in a new population:

Back 35

mutation

Front 36

In the crossing of organisms which desirable traits to produce offspring with a combination of these desirable traits.

Back 36

selective breeding

Front 37

The comb. of a dom. and rec. gene results in a mutation.

Back 37

False: hybrid

Front 38

Most traits are controlled by 2 pairs of genes.

Back 38

true

Front 39

A punnett square can be used to predict the percentage of an offspring with a certain trait.

Back 39

true

Front 40

A pure gene is one whose trait is always expressed.

Back 40

False: dominant gene

Front 41

natural selection is a change in genes that can cause a new trait to appear.

Back 41

False: mutation

Front 42

The final appearance of an organisms trait may not always be the result of the genes.

Back 42

true: environment and adaptation

Front 43

Scientists can move a gene from one org. from a species to another org. from a diff. species.

Back 43

true

Front 44

a hybrid trait cannot be expressed in the presence of a dom. gene

Back 44

true

Front 45

A characteristic passed from parent to offspring is a:

Back 45

trait

Front 46

If a gene for a white is dom. and the gene for red is rec., then the offspring of a pure white flower and a pure red flower will be:

Back 46

all white

Front 47

A trait that results when both genes in a pair are dominant is:

Back 47

pure

Front 48

Some genes are neither dom. or rec. and the trait they express together is:

Back 48

hybrid

Front 49

The crossing of organisms to make a desirable trait is:

Back 49

selective breeding

Front 50

What factors in the environment change the final appearance of an organism without changing the genes of the organism?

Back 50

Sunlight, habitat, nutrition.

Front 51

When will the trait of a rec. gene be expressed?

Back 51

When the recessive gene is pure recessive.

Front 52

An offspring has long eyelashes. One parent has long the other has short eyelashes. NEither parent is a hybrid. Which gene is dominant?

Back 52

long eyelashes

Front 53

One parent has a hybrid trait, the other has a pure. How do you figure it out?

Back 53

punnett square

Front 54

What is the chance that the offspring in question 1 will have the pure trait?

Back 54

50%