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2 months ago
Some animals in captivity have reproduced without the need for a mate in a process called parthenogenesis. Examples include boas, pythons, bonnethead sharks, and komodo dragons. Initially, scientists thought this occurred because the animals were kept in optimal conditions for reproduction, but lacked access to a mate. However, scientists were surprised to discover that some species in the wild with access to mates also reproduce through parthenogenesis. An example is the pit-viper.

Compare and contrast the processes of sexual reproduction and asexual reproduction through parthenogenesis for an animal such as the python.

Describe the processes of sexual reproduction and asexual reproduction through parthenogenesis.

Describe two pros and two cons of each form of reproduction. Explain each one. (
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2 months ago
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Compare and contrast the processes of sexual reproduction and asexual reproduction through parthenogenesis for an animal such as the python.

In parthenogenesis, reproduction occurs asexually when a female egg cell develops into a new individual without fertilization. For this to happen, the egg being haploid needs to transform to a diploid cell by chromosome duplication or fusion with a polar body. In sexual reproduction, two gametes fuse together (both being haploid, half the number of chromosomes) to form a diploid organism.

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Describe the processes of sexual reproduction and asexual reproduction through parthenogenesis.

The details of this answer depends on how much information you're given in your textbook. Here are some points you can add into your response:

  • In parthenogenesis, reproduction occurs asexually when a female egg cell develops into a new individual without fertilization.
  • Parthenogenesis that happens by apomixis involves the replication of an egg by mitosis resulting in diploid cells that are clones of the parent.
  • Parthenogenesis that happens by automixis involves the replication of an egg by meiosis and the transformation of the haploid egg to a diploid cell by chromosome duplication or fusion with a polar body.
  • In arrhenotokous parthenogenesis, the unfertilized egg develops into a male.
  • In thelytoky parthenogenesis, the unfertilized egg develops into a female.
  • In deuterotoky parthenogenesis, a male or female may develop from the unfertilized egg.

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Describe two pros and two cons of each form of reproduction. Explain each one. (

Pros of sexual reproduction
  • Increases genetic diversity in a population; the more diverse the alleles in a population, the less likely an offspring is to suffer from a genetic disease
  • Individuals within a population can acquire different traits and alleles for a single gene. 
Cons of sexual reproduction
  • A partner is required for it to happen naturally; therefore it increases competition within a population to find a mater
  • The genetic results of sexual reproduction are unpredictable, offspring may acquire a trait that neither the mom or the dad showed phenotypically (some traits skip a generation)


Pros of Parthenogenesis

  • No mate is required
  • Allows for genetic immortality; alleles of good genes can continue within the gene pool
Cons of Parthenogenesis
  • Creates a monoculture of species; individuals within a population who have too similar alleles can all eventually be wiped out if they're sensitive to an external factor -- hence, less genetic diversity
  • Offspring cannot acquire different traits, diversity decreases.
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2 months ago
Answer marked as solved. Please let me know if you have any questions
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2 months ago
Parthenogenesis is an adaptive strategy to ensure the reproduction of organisms when conditions are not favorable for sexual reproduction. Asexual reproduction can be advantageous to organisms that must remain in a particular environment and in places where mates are scarce. Numerous offspring can be produced without "costing" the parent a great amount of energy or time. A disadvantage of this type of reproduction is the lack of genetic variation. There is no movement of genes from one population to another. Due to the fact that environments are unstable, populations that are genetically variable will be able to adapt to changing conditions better than those that lack genetic variation.
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