Unit A Section 3,4

Question 1

What does DNA stand for?

Answer 1

Deoxyribonucleic acid

Question 2

what does DNA contain

Answer 2

your genetic code (blueprint)

Question 3

what is the form of

Answer 3

twisting ladder (double helix)

Question 4

Where are nucleotides found?

Answer 4

‘Rung’ of DNA ladder

Question 5

name the bonds of nucleotides

Answer 5

Thymine- adenine

Guanine-cytosine

Question 6

how many pairs of chromosomes do humans contain

Answer 6

23 (46 in total)

Question 7

what are chromosomes made up of

Answer 7

Genes

Question 8

Define genes

Answer 8

Uninterrupted segments of DNA with coded instructions

Question 9

What are alleles

Answer 9

Inherited characteristics

Question 10

where does mitosis occur

Answer 10

body cells

Question 11

what happens in mitosis

Answer 11

parent cell causes 2 daughter cells to be produced, with full sets of DNA

Question 12

What happens in meiosis

Answer 12

Cells with only half of the DNA are produced

Question 13

what does meiosis produce

Answer 13

Sex cells (gametes)

Question 14

How do you show a purebred

Answer 14

2 capital or 2 lowercase letters (depending on dominance)

Question 15

How do you show a hybrid

Answer 15

1 uppercase and 1 lowercase

Question 16

define dominant trait

Answer 16

what we see when 2 opposite cells are inherited

Question 17

define recessive trait

Answer 17

A trait only visible when there is no dominant trait present

Question 18

Define hybrid

Answer 18

An organism produced from 2 purebred

Question 19

what is in-situ conservation

Answer 19

Maintenance of population of an organism within its ecosystem

Question 20

ex situ conservation

Answer 20

Conservation of biological diversity outside of their natural habitat

Question 21

define biotechnology

Answer 21

a technology that uses living things to create agricultural,industrial or medicinal products

Question 22

3 types of biotechnology

Answer 22

• cloning plants
• artificial reproductive technology
• genetic engineering

Question 23

what do they use to clone plants

Answer 23

Petri dish containing a cell with the desirable trait

Question 24

2 types of artificial reproduction

Answer 24

• insemination

- in Vitor fertilization

Question 25

___________ is when the sperm is harvested from the male and inserted into the female

Answer 25

Artificial insemination

Question 26

_________ Is when sperm and egg are fertilized in Petri dish

Answer 26

In vitro fertilization

Question 27

Define genetic engineering

Answer 27

A technology that directly alters the DNA of an organism

Question 28

Define extrication

Answer 28

Extinction in a certain area

Question 29

Where is DNA found?

Answer 29

in the nucleus