Sexual selection

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  • Created by: danpurdy1
  • Created on: 13-10-17 19:53
Define sexual selection
An evolutionary explanation of partner preference
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What are passed on to offspring?
Genes that are caused advantageous changes in attributes or behaviours
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What is human reproductive behaviour about passing on?
Genes that are advantageous due to sexual selection
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What does ansiogamy refer to?
Differences between male and female sex cells (gametes)
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What is the male gamete called?
Sperm
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Name three features of sperm
Small, very mobile and produced continually in large amounts
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What is the female gamete called?
Egg (ova)
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Name three features of an egg (ova)
Large, static, produced at intervals and in smaller quantities than sperm
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Is there a shortage of males or females?
Fertile women but no shortage of fertile males
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What are the two types of sexual selection called?
Inter and intra
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What is the preferred strategy of females?
Inter sexual selection
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Why is the preferred strategy of females inter sexual selection?
Due to it being more about quality rather than quantity
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Who researched inter sexual selection?
Trivers
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What was the findings from Trivers research?
They make a greater investment of time, commitment and resources
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Why are females more choosy than males?
Females would lose more than males
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What is the preferred strategy of males?
Intra-sexual selection
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Why is the preferred strategy of males intra-sexual selection?
Due to it being about quantity over quality
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What does intra-sexual selection refer to?
Competition between males to be able to mate with a fertile female as the male will pass on genes
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Define dimorphism
The obvious difference between males and females
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What consequences does intra-sexual selection have?
Behavioural and psychological --> aggressive behaviour and change of shape
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Other cards in this set

Card 2

Front

What are passed on to offspring?

Back

Genes that are caused advantageous changes in attributes or behaviours

Card 3

Front

What is human reproductive behaviour about passing on?

Back

Preview of the front of card 3

Card 4

Front

What does ansiogamy refer to?

Back

Preview of the front of card 4

Card 5

Front

What is the male gamete called?

Back

Preview of the front of card 5
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