Reproduction (General) Flashcards

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1
Q

What is sexual reproduction?

A

The process involving the fusion of the nuclei of two gametes to form a zygote and the production of offspring that are genetically different from eachother through meiosis

A gamete is a sex cell which has a haploid nucleus meaning it only has half of the chromosones found in body cells. For humans, a sperm and ovum and for plants the pollen nucleus and ovum are gametes. When the gametes fuse together, it forms a diploid cell, known as a zygote

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2
Q

What is asexual reproduction?

A

The process resulting in genetically identical offspring being produced from one parent through mitosis

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3
Q

What are the advantages of sexual reproduction?

A
  • Increases genetic varation
  • The species can adapt to a new enviroment due to variation, aiding in survival
  • Disease is less likely to affect the species due to variation
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4
Q

What are the disadvantages of sexual reproduction?

A
  • A mate is needed
  • Reproduction is slow and produces relatively small numbers of offspring
  • Isolated members of species may find it diffucult to reproduce
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5
Q

What are the advantages of asexual reproduction?

A
  • Rapid reproduction
  • Can exploit suitable enviroments quickly
  • More time and energy efficient (no mate is needed)
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6
Q

What are the disadvantages of asexual reproduction?

A
  • No genetic variation (apart from random mutations) as offspring are identical to parents
  • Population is vunerable to change in enviroment and may only be suited to one enviroment
  • Disease is likely to affect the whole population
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7
Q

What must fuse during fertilisation?

Fertilisation only occurs in sexual reproduction

A

A male and female gamete

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7
Q

What is the product of fertilisation called and what does it develop into

A
  • It is called a zygote
  • It develops into an embyro through cell division
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