Genetic Variation.

Question 1

Gene:

Answer 1

DNA sequence that specifies and maintains an individual’s character.
Ex: ABO Blood type gene.

Question 2

Character:

Answer 2

The external and internal features that are common to all individuals in the same species.
EX: Pigmented iris.

Question 3

Variation:

Answer 3

Differences between individuals of the same species.
Ex: Height and Flower color.

Question 4

Trait:

Answer 4

Characters that differ between individuals.
Ex: Blue, brown eyes.

Question 5

Sources of Variation:

Answer 5

Environmental variation.
Genetic Variation.

Question 6

Environmental Variation:

Answer 6

Arises when individuals live in different environments.
Ex: Difference in altitude.

Question 7

Genetic Variation:

Answer 7

It is caused by differences in DNA. Genetic variation between individuals in the same species is quite limited.
Can be passed to offspring.

Question 8

Genetic Variation between humans is:

Answer 8

0.01% difference.

Question 9

A type of genetic vatriation:

Answer 9

Silent Genetic Variation.

Question 10

Silent Genetic Variation:

Answer 10

Does not produce traits.
Can be passed from parent to offspring.

Question 11

Genetic variation that produces traits is:

Answer 11

Located near or on a gene.

Question 12

Inheritance:

Answer 12

The process of Transmitting traits from parent to offspring.

Question 13

What affects gene activity?

Answer 13

Genetic Variation.

Question 14

Allele:

Answer 14

A genetic variation that produces a particular trait.

Question 15

The ABO type gene is produced by how many genes?

Answer 15

1 gene.

Question 16

Common Trait of ABO blood type:

Answer 16

A, B, AB, O.

Question 17

Type of O is produced by:

Answer 17

The I allele.
Individuals with two I alleles have type O blood.

Question 18

Example of genetic and environmental variation interaction:

Answer 18

The final height of an individual involves nutrition and diet.
In a particular environment, beneficial traits are more likely to be passed on.

Question 19

Affected protein in sickle cell disease:

Answer 19

Hemoglobin.

Question 20

Type of cell affected by sickle cell disease:

Answer 20

Red blood cells.

Question 21

Benefit of individuals who are heterozygous for sickle cell disease:

Answer 21

They get an innate protection from malaria.

Question 22

Where are high frequencies of sickle cell allele found in populations:

Answer 22

Regions near the coasts.

Question 23

Why does sickle cell trait still persist in some U.S population:

Answer 23

It takes a while for genetics to change.
The genes are still being passed on.