Unit A - Section 3

Question 1

What is the longer version of DNA

Answer 1

Deoxyribonucleic Acid

Question 2

What is DNA

Answer 2

DNA is the inherited material responsible for variation. All living organisms contain DNA in their cells

Question 3

Genetic code

Answer 3

Based on arranging the four chemical “letters” into “words” or instructions that describe how to make any particular organism

Question 4

Chromosomes

Answer 4

To fit large amounts of DNA into their cells organisms arrange their DNA into packages. These packages r called chromosomes

Question 5

How many chromosomes do humans have in their body

Answer 5

In each human cell nucleus contains 46 chromosomes

Question 6

How many chromosomes does a dog have

Answer 6

A dog has 78 chromosomes

Question 7

How many chromosomes does a cat have

Answer 7

A cat has 38 chromosomes

Question 8

What is a gene

Answer 8

Uninterrupted segment of DNA which contains coded instructions

Question 9

Mitosis

Answer 9

Occurs in the body cells of multicellular organisms and is responsible for the growth and cellular repair of a multicellular organism

Question 10

Meiosis

Answer 10

A cell division that produces cells with half the DNA of a normal cell

Question 11

Traits

Answer 11

Characteristics of a species

Question 12

Purebred

Answer 12

A breeder who wishes to produce white cats should choose purebred parents: cats whose ancestors have produced only white offspring for several generations.

Question 13

Hybrid

Answer 13

An individual produced by crossing two purebred parents that differ in a trait such as coat color is known as a hybrid

Question 14

Where r genes located

Answer 14

Genes are located on the chromosomes

Question 15

4 DNA words

Answer 15

Guanine G
Cytosine C
Adenine A
Thiamine T