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Year 8 science > Inheritance > Flashcards

Inheritance Flashcards

1
Q

What is DNA

A

DNA stands for deoxyribonucleic acid and it determines what inherited characteristics you have

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2
Q

What are chromosomes

A

They are the structure the DNA is wound into

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3
Q

What is a gene

A

It is a small section of DNA found on a chromosome which codes for a protein. Different genes control the development of different characteristics E.G hair colour

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4
Q

What is a genome

A

The term for the entire set of genetic material in an organism

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5
Q

How many pairs of chromosomes do humans have

A

23

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6
Q

Does each cell in your body have the same DNA

A

Yes

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7
Q

Which chromosomes do males have

A

XY

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8
Q

Which chromosomes do females have

A

XX

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9
Q

What is the structure of DNA

A

A double helix

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10
Q

DNA is made up of 4 bases. What are these bases

A

Adenine, Thymine, Guanine and Cytosine

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11
Q

How many sex chromosomes do humans have

A

23

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12
Q

Are genes inherited from our parents

A

Yes

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13
Q

What is variation

A

Variation is any difference between a characteristic of an animal

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14
Q

What is inherited characteristics

A

They are characteristics that have been passed down from our parents

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15
Q

What are characteristics

A

They are a feature of an organism

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16
Q

What is a species

A

Organisms that are genetically very similar and can mate to produce fertile offspring

17
Q

What are environmental characteristics

A

They are characteristics determined by how we live and the choices we make in life

18
Q

What is discontinuous variation

A

It is variation that can take any value and is caused by environmental factors or lots of different genes working together

19
Q

What is continuous variation

A

It is variation that can only result in one Carta in value and is usually caused by one or two inherited genes

20
Q

What do animals compete for

A

Food, water, mates, territory to hunt/forage/and for shelter E.C.T

21
Q

What do plants compete for

A

Water, light, mineral ions, space, pollinators

22
Q

What is an adaption

A

A characteristic that allows an organism to survive and be successful

23
Q

What is evolution

A

It is when an animal passes on genes to their offspring so that their offspring can become better adapted to the environment.

24
Q

What does extinct mean

A

Extinction is when there are no more individuals of a species anywhere in the world

Year 8 science (11 decks)

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