LIFECYCLE QUESTIONS
(i)
(2)
(ii)
(2)
(i)
(1)
(ii)
(1)
(ii
i)
|
LIFECYCLE QUESTIONS |
||||
| 1. | The diagram shows the life cycle of a single-celled organism. The zoospores are produced by cell division and are small versions of the adult | |||
|
|
||||
| (a) | Mark with an X on the diagram where meiosis takes place in this life cycle. | |||
| (1) | ||||
| (b) | Explain | |||
|
(i) |
why the zoospores labelled X on the diagram all have the same genotype (genetic constitution) | |||
|
|
(2) |
|||
|
(ii) |
why the zoospores labelled W will have a variety of different genotypes | |||
|
(2) |
||||
| (c) | If a zoospore of this organism contained 4 chromosomes. How many chromosomes would you expect to find in | |||
|
(i) |
the gamete from another organism | |||
|
(1) |
||||
|
(ii) |
the adult organism | |||
|
(1) |
||||
|
(ii i) |
the zygote | |||
|
|
(1) | |||