Reproduction - Term 1 Y9 Flashcards
What is Sexual reproduction?
Sexual reproduction is when each parent gives half of their DNA to the gamete. Which means that the offspring will be genetically different from the parents.
What is Asexual reproduction?
Asexual reproduction is when the offspring is genetically identical to the parent, which will only need to consists of one parent.
What are 3 advantages and disadvantages of sexual reproduction?
Advantages:
- increase in genetic diversity
- decrease in genetic disorders (due 2 genetic diversity)
- able to easily adapt to new environment
Disadvantages:
- Longer gestational period
- have to find mate
- requires more energy
What are 3 advantages and disadvantages of asexual reproduction?
Advant
- Can create many offspring
- lower gestational periods
- beneficial traits always pass on
Disadvant
- Lack of diversity
- increase in genetic disorders (due to lack of genetic diversity)
- increased change of extinction: due to sickness
What are gametes?
Animals specialized reproductive cells -
Male = sperm and Female = egg
What is fertillisation?
When male gametes (sperm) joins with female gametes (egg), which creates a new cell - zygote.
What is Unicellular and some examples?
Unicellular is single-celled organisms, for example, bacteria and protists
What is the cell theory?
- all things are made up of cells
- cells are the basic unit of life
- all cells come from pre-existing cells
What is Multicellular and some examples?
Multicellular is when organisms contain different types of specialised cells, for example, animals, plants, fungi
What is some key information for sexual reproduction in plants?
- Male gamete in Plants: Pollen
- Female gamete in plants: egg or ovum.
- Pollen is produced in the anther.
- Pollination – is when the pollen is deposited on the stigma.
