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Genetics and Variation > Genetics and Variation1 > Flashcards

Genetics and Variation1 Flashcards

1
Q

What is the molecular structure of DNA?

A

Double Helix

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2
Q

What is evolution?

A

Where organisms have changed from earlier forms of life

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3
Q

What is the name given to a thread like structure made of DNA?

A

A chromosome

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4
Q

What is a dominant gene?

A

A dominant gene will stay in the product’s DNA

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5
Q

What is a recessive gene?

A

A recessive gene will be taken over by a dominant gene in the product’s DNA

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6
Q

What is extinction?

A

The complete disappearance of a species from Earth

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7
Q

What is a fossil?

A

The remains or impression of a prehistoric plant or animal embedded in rock and preserved in its petrified form

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8
Q

Gene definition

A

Section of DNA that codes a characteristic

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9
Q

What is an invertebrate?

A

An animal without a backbone

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10
Q

What is natural selection?

A

A theory proposed by Charles Darwin, where the best adapted organisms survive and pass on their genes

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11
Q

What is a vertebrate?

A

An animal with a backbone

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12
Q

What are the 5 key vertebrate groups?

A

Fish, amphibians, reptiles, birds and mammals

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13
Q

What are the main features of a fish?

A

They have scales, live in water, are cold blooded, lay eggs and have gills

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14
Q

What are the main features of an amphibian?

A

They have smooth skin, live in water and land, cold blooded and lay eggs

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15
Q

What are the main features of a reptile?

A

They have scales, lay eggs, cold blooded and have lungs

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16
Q

What are the main features of a bird?

A

They have feathers, warm blooded, lay eggs and have lungs

17
Q

What are the main features of a mammal?

A

They have hair or fur, warm blooded, live births and have lungs

18
Q

What are the three types of fossils?

A

Impression fossils, preserved organisms and mineral replacement

19
Q

What are 5 causes of extinction?

A

Environment changes quickly, there is a new predator, a new disease, competition for food with another species or a catastrophic event

20
Q

Who was awarded the Nobel Prize for medicine and physics in 1962?

A

James Watson, Francis Crick and Maurice Wilkins

21
Q

What was the name of the woman who produced photo 51, what helped humans figure out the molecular structure of DNA?

A

Rosalind Franklin

22
Q

Who found fossils on the Jurassic coast, in Lime Regis? What was her major discovery?

A

Mary Anning discovered and Ichthyosaurus fossil

23
Q

Which is dominant, blonde hair or brown hair?

A

Brown hair

Genetics and Variation (1 decks)

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