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B1 > B1.2.1 - DNA > Flashcards

B1.2.1 - DNA Flashcards

1
Q

How many chromosomes do humans have in each of their cells?

A

They have 46 chromosomes in each of their cells

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2
Q

How many chromosomes do chickens have in each of their cells?

A

They have 78 chromosomes in each of their cells

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3
Q

Where do we get our chromosomes from?

A

We inherit half from our father and half from our mother

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4
Q

What is each long molecule of DNA called?

A

A chromosome

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5
Q

What are genes?

A

They are short sections of DNA that code for a characteristic, such as eye colour

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6
Q

What is structure of DNA?

A

It is made up of 2 strands joined together by bases. The strands are then twisted together to form a double helix

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7
Q

What small units makes up DNA?

A

Nucleotides

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8
Q

What is each nucleotide made up of?

A

A sugar (called deoxyribose), a phosphate group and a base

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9
Q

What are the 4 different bases called?

A

Adenine
Thymine
Cytosine
Guanine

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B1 (15 decks)

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