Inheritance Revision Questions (22 Marks)
Q1. Cystic fibrosis is an inherited disease which causes the tubes in the lungs to be blocked with
sticky mucus. Two parents who do not have the disease can still produce children who do have the
disease.
(a) Explain how children can inherit this disease from parents who do not have it (use a
genetic diagram in your answer if you want to).
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
________________________________________________________________ (4)
(b) Mucus contains protein. The information for the production of this protein is stored
in a gene.
Explain how a change in a gene causes a different protein to be produced.
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
__________________________________________________________________ (3)
(Total 7 marks)
Q2. These young rabbits look like their parents. This is because information about characteristics
such as fur colour is passed from parents to their young.
Choose words from this list to complete the sentences below.
body chromosomes clones cytoplasm
genes nucleus sex
Information is passed from parents to their young in ______________________ cells.
Each characteristic, e.g. fur colour, is controlled by _______________________ .
The structures which carry information for a large number of characteristics are
called ________________________ .
The part of the cell which contains these structures is called the _________________ .
(Total 4 marks)
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Q1. Cystic fibrosis is an inherited disease which causes the tubes in the lungs to be blocked with
sticky mucus. Two parents who do not have the disease can still produce children who do have the
disease.
(a) Explain how children can inherit this disease from parents who do not have it (use a
genetic diagram in your answer if you want to).
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
________________________________________________________________ (4)
(b) Mucus contains protein. The information for the production of this protein is stored
in a gene.
Explain how a change in a gene causes a different protein to be produced.
___________________________________________________________________
___________________________________________________________________
___________________________________________________________________
__________________________________________________________________ (3)
(Total 7 marks)
Q2. These young rabbits look like their parents. This is because information about characteristics
such as fur colour is passed from parents to their young.
Choose words from this list to complete the sentences below.
body chromosomes clones cytoplasm
genes nucleus sex
Information is passed from parents to their young in ______________________ cells.
Each characteristic, e.g. fur colour, is controlled by _______________________ .
The structures which carry information for a large number of characteristics are
called ________________________ .
The part of the cell which contains these structures is called the _________________ .
(Total 4 marks)
Page 1 of 4
