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Asexual and Sexual Reproduction

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Giana P

on 16 September 2014

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Transcript of Asexual and Sexual Reproduction

Asexual and Sexual Reproduction
Sexual Reproduction
In sexual reproduction, one parent is a male and the other is a female.
Meiosis is a type cell division that produces haploid cells (sex cells), the male sex cell is called a sperm cell and the female sex cell is called an egg
Sex cells are produced through a type of cell division called meiosis
Sex cells have only half of the full set of genetic material found in body cells
Compare and Contrast the Advantages & Disadvantages
Which One Is Better?
Advantages and Disadvantages of Sexual Reproduction
By Ashita and Giana
Advantages and Disadvantages of Asexual Reproduction
Asexual Reproduction is when one organism reproduces many other organisms that look exactly alike.
The organism that gives birth to a baby is called a parent.
The baby is called an offspring.
The parent passes all of its genes to the reproduced organism, causing it to be exactly similar to the parent.
The genes may be changed if a genetic mutation happens.
How Do Organisms Reproduce Asexually??
There are many different ways an organism can reproduce asexually.
Prokaryotes (bacteria and archea) reproduce by cell division.
Eukaryotes (single-celled and multicellular organisms) reproduce by a more structured process, mitosis.
Mitosis is a type of cell division that produces diploid cells (body cells), which makes cells that are genetically identical to the parent.
There are four different ways a cell divides asexually.
Bianry Fission and Spores
Binary Fission happens in prokaryotes
This happens when the parent cell splits into two separate and new cells.
The cells are just like the parents genetically.
Spores happens in both prokaryotes and eukaryotes.
They can survive very harsh conditions.
Spores are created by only one single parent cell.
A spore can even turn into an organism like fungus!
Budding and Vegetative Reproduction
Budding is when a bud grows on an organisms body
A bud grows until it is a full-sized organism with the same exact genes as the parent.
Single-celled yeasts and multicelluar hydras reproduce by budding.
Vegetative reproduction is when new plants grow from stems, roots ,and leaves.
Runners are aboveground stems that new plants form from and tubers are underground stems that new plants form from.
The plantlets that grow on the organisms leaves drop off and grow into full-sized plants themselves.
Organisms can reproduce very quickly, increasing the population
An Offspring is identical to the parent so any good trait from the parent will be passed on to the baby.
Also, an organism does not need a partner to reproduce.
There is no complex structures in asexual reproduction
There is no genetic variation, so the babies are less likely to survive in changing environments and conditions.
What Is It
Two parents each contribute a sex cell to the new organism
Half of the genes in the offspring come from each parent
This means that the offspring isn't identical to its parents, the offspring has a combination of traits that comes from both parents
Part 1
Part 2
It's the process of when a sperm cell and an egg join together
When an egg is fertilized by a sperm a new cell, called a zygote, is formed
Because the joining of two sex cells, this new cell has a full set of genetic material
To develop into a new organism, the zygote goes through mitosis which increases the number of cells
Mitosis is what causes the cell to grow into an organism
Offspring has genetic variation
They get different traits so at least some of them will survive in an environmental change
They are not identical to their parents which means they are more likely to survive.
This way of reproduction is not quick
It doesn't produce a lot of offspring either
Without a mate of the opposite gender, the reproduction won't take place
There is no better way of reproduction. Sexual and asexual reproduction have their own pros and cons. When compared, each type is better in some aspects than the other.
Asexual reproduction is quicker and produces more offspring than sexual reproduction
Sexual reproduction has offspring with genetic variation so they are more likely to survive but, offspring of asexual variation are identical to their parents so they have no genetic variation
Sexual reproduction requires a complex structure while asexual reproduction doesn't
Sexual reproduction requires mates of different genders while asexual reproduction doesn't need mates at all
Advantages of Using Both Types of Reproduction
Many organisms are able to use both types of reproduction. For example, some plants and fungi will use asexual reproduction if the environment is favorable. But when the environment changes, these organisms switch to sexual reproduction to increase genetic variation. This strategy increases the chance of these organisms' survival. Both sexual and asexual reproduction can be helpful, but one is better than the other is some environments.
Asexual Reproduction
What Is It?
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