Asexual Reproducation

Asexual Reproduction

Bacteria Binary Fission

• Rapid population growth

• Requires less energy

• All organisms are capable of reproduction (not just females)

• One organism can make a population

• Less likely to biome extinct

• Each offspring is a genetic copy of the parent​

Asexual Benefits

• There is NO genetic diversity (clones)

• Susceptible to disease

• Can’t adapt to a changing environment.

Asexual Disadvantage

Asexual Reproduction Types​

• Binary Fission or Multiple Fissions​

• Budding

• Vegetative Propagation

• Regeneration​

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Binary Fission

• Bacteria some protists

• One parent splits into two offsprings

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Budding

• hydra, cactus

• New growth off a parent

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Regeneration

• worms, sea stars, geckos, planarian, worms

• Regrow a lost limb or a whole other organism on a cut-off piece.

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Vegetative Propagation

• ivy, grases, strawberries, spiker plants...

• New plants grow off an existing part of an old plant.

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Sexual Reproduction

By R Marsh, PhD.

SEXUAL REPRODUCTION (MEOSIS)

• Two organisms of the same species

• Sex cells called gametes

  • Animals have sperm(male) and ovum (female)

  • Plants have pollen (sperm) and ovum (egg)

• Two sex cells fuse together (fusion) to create new and genetically different offspring.

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Advantages of Sexual Reproduction:

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• More adaptability

• More variation

• Greater chance of mutation

• Greater chance of survivability with environmental change.

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Disadvantages of Sexual Reproduction:

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• Requires two individuals with opposing gamest (sex cells)

• Must use a lot of energy to nourish and grow a new organism.

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• Sexual or Asexual reproduction?

Multiple Choice

The are a number of different strategies various organisms use in order to reproduce asexually (for example, budding, binary fission, sporulation, etc). What they all have in common is:

• Offspring are from one parent, and are clones.
• Offspring produced from one parent, and are genetically unique.
• Offspring are produced from 2 parents, and are clones.
• Offspring are produced from 2 parents, and are genetically unique.

Multiple Choice

Compared to sexual reproduction, what is an advantage for asexual reproduction?

• It leads to greater genetic diversity
• It allows for greater ability of the parent organism to care for it's offspring.
• Asexual reproduction preserves the life of the parent organism, unlike sexual reproduction.

• It is quicker.

Multiple Choice

What process creates reproductive cells used in sexual production?

• meiosis

• mitosis

• cellular respiration

• photosynthesis

Multiple Choice

The main advantage of meiosis and sexual reproduction is the creation of _____________ offspring.

• fewer

• more

• diverse

• cloned

Multiple Choice

Half the _________ in the offspring come from each parent.

• genes

• molecules

• particules

• substances

Multiple Choice

The diagram below represents reproduction in a yeast cell. The genes in the bud are identical to the genes in the parent. This type of production of offspring is a form of

• sexual reproduction

• asexual reproduction

• gene manipulation

• genetic engineering

Multiple Select

Which of the following statements are true about asexual reproduction? (chose all that apply)

• Asexual reproduction requires only one parent.

• The offspring in asexual reproduction are clones of the parent.

• The offspring in asexual reproduction are produced by mitosis.

• The offspring in asexual reproduction are produced by meiosis.

Multiple Choice

The organism produced during reproduction is called a(n) _____________.

• child

• growth

• offspring

• baby

Multiple Choice

Sex cells have ____________ of the DNA found in body cells.

• all

• none

• half

• a little bit