Variation Flashcards

1
Q

How do we know if 2 animals are the same species?

A

They share similar features.Can breed and have fertile offspring

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2
Q

What do we call differences between organisms?

A

variation

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3
Q

Variation (differences between individuals) is caused by…

A

Genes

Environment

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4
Q

Give 3 examples of variation that are caused by genes

A

Eye colour
Hair colour
Face Shape

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5
Q

Give 3 examples of variation that is caused by the environment.

A

Scars
Hair length
Amount of muscle

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6
Q

Give an example of variation that is caused by both genes and the environment

A

Nose shape - genes decide the shape but you may break it or have surgery

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7
Q

How are identical twins formed?

A

Fertilisation of an egg and sperm cellFormation of an embryo that splits in twoTwo new embryos grow into identical twins

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8
Q

Identical twins have the same…

A

genes

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9
Q

Variation between identical twins is caused by…

A

the environment

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10
Q

Why is the height of different students a continuous variable?

A

Because there are many different possible height values

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11
Q

Why is the eye colour of different students a categoric variable?

A

Because there are only a few possible values (blue, green, brown)

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