B3h More of the Same Answer

B3h More of the Same Answer Sheet

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  • Created by: Amira
  • Created on: 02-05-12 09:18
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B3h More of the Same
1. Sexual reproduction is when there are two parents involved. A male gamete (sex cell) joins
up with a female gamete (sex cell). This process is known as fertilization. The offspring
produced in this way will contain chromosomes from both parents.
2. In animals the male sex cell (gamete) is normally sperm and the female sex cell is normally
the eggs. In plants the male gamete is pollen and the female sex cell is the ovule. In plants
seeds are produced as a result of fertilisation.
3. The potato can be cut up into several pieces and planted to produce many identical potato
plants all the plants produced will be genetically identical to the original plant the potato was
taken from. This type of reproduction is called asexual reproduction. The offspring produced
by asexual reproduction are called clones. The clones are genetically identical.
4. Advantages of sexual reproduction, for example plants grown from seeds:
Genetic variation
If one of them is susceptible to a disease the others may survive (because they have
genetic variation)
The disadvantages of sexual reproduction:
We cannot be sure about the outcome ( babies or plants, generally this is about
plantscrops such as, tomatoes, apple trees, flowering plants)
They will not be of the same quality or characteristics
Advantages of asexual reproduction, is just the opposite of 4. Try to write these for yourself:
5. Ann grows strawberry plants.
Strawberry plants can reproduce sexually or asexually
a) If all of Ann's strawberry plants have been produced by asexual reproduction.
They are genetically identical because they have all been produced from one
strawberry plant.

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The table shows some of the stages when a strawberry plant reproduce asexually.
Put the stages in the correct order.
Write numbers in the table to show your answer.
The first one has been done for you.
c) Ann's neighbour Harry grows apple trees.
He has grown his apple trees from seeds. His trees are not genetically identical.
Describe one advantage of Harry's apple trees not being genetically identical.…read more

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