What have these animals got in common? - pams

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Transcript What have these animals got in common? - pams

What have these animals got in
common?
Class work
28 March 2016
Title - Reproduction
To further our knowledge of
reproduction
Learning Outcome – Grade E-F
Learning Outcome – Grade C-D


Sexual reproduction needs two parents,
each parent produce sex cells called
gametes.
Can you describe what asexual
reproduction involves?
Genetic information



Different genes control the development of different
characteristics by giving instructions to the cell.
These instructions are carried inside the nucleus by
chromosomes.
These instructions are made of a chemical called DNA.
Recap from yesterday

Inside cells are coded instructions
[bases/genes/protein].

The instructions are made of a chemical
called [DNA/DNN/Chromosomes].

The instructions are carried inside the
nucleus on structures called [amino
acid/Chromosomes/nucleus].
Reproduction
There are two main ways by which organisms can reproduce:
Sexual
Asexual
What do you think sexual reproduction is?
Sexual reproduction needs two parents.
Each parent produces sex cells, called gametes.
What are the male sex cells called?
Sperm
What are the female sex cells called?
Eggs
Reproduction
Most human body cells contain
46 chromosomes.
How many pairs of chromosomes is this?
23 pairs of chromosomes
You inherit half of your chromosomes from your
mother and half of them from your father.
Other species have a different number of chromosomes; for
example:
 cat = 38 chromosomes
 chicken = 78 chromosomes
Reproduction
Asexual reproduction only needs one parent.
All the offspring are genetically identical to
each other, and their parent.
 They are clones.


Organisms that produce asexually include;
 Potatoes
 Strawberry's
 Spider plants
Asexual reproduction
 Gardeners
use asexual reproduction to
create new plants that are identical to
the parent plants.
 They cannot create new varieties this
way.
 But they can produce required plants
much quicker than growing them from
seeds produced in sexual reproduction
Sexual and Asexual reproduction
Give ONE example for each type of reproduction
Dominoes review
Dominoes - Review
Learning Outcome – Grade E-F
Learning Outcome – Grade C-D


Sexual reproduction needs two parents,
each parent produce sex cells called
gametes.
Can you describe what asexual
reproduction involves?