Curriculum
Course: AQA A Level Biology 7402
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Curriculum

AQA A Level Biology 7402

1. Biological Molecules

0/102

2. Cell Structure

0/95

3. Exchange and Transport

0/98

4. Genetics, Variation and Interdependence

0/94

5. Energy Transfers In and Between Organisms (A Level only)

0/63

6. Organisms Respond to Changes in their Environments (A Level only)

0/93

7. Genetics, Populations, Evolution and Ecosystems (A Level only)

0/55

8. The Control of Gene Expression (A Level only)

0/72

9. Exam Guidance and Skills

0/38
Quiz

4.6.9 Genetic Relationships Between Organisms – Exam questions

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  • Questions count: 8
  • Passing grade: B+
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1.
Premarital screening in Saudi Arabia tests for certain recessive genetic disorders. Why is the risk of these disorders higher in marriages between relatives?
Because consanguineous marriage increases the chromosome number of the children
Because recessive alleles become dominant in consanguineous marriages
Because a carrier (Aa) shows symptoms and passes them on directly
Because the spouses are more likely to carry the same recessive allele (Aa), so it can appear in the children as two copies
2.
What can be inferred from the data about the ecological relationship between P. ochraceus and M. californianus?
SAT Biology - Question 054
A
B
C
D
E
3.
The graph below shows the relationship between species A and biodiversity in an ecosystem.
SAT Biology - Question 071
A
B
C
D
E
4.
According to the chart, which best describes the relationship between solar energy and net primary production?
SAT Biology - Question 176
A
B
C
D
E
5.
Which key term matches this description: "Close long-term relationship between species."
Which key term matches this description: "Close long-term relationship between species."
Camouflage
Commensalism
Predation
Symbiosis
6.
In the barnacle table, in which zone is competition between the two species likely to be strongest?
Upper zone
Lower zone
Middle zone
Above the high-tide line
7.
Which is NOT a way energy is lost between trophic levels?
Respiration
Photosynthesis
Egestion
Excretion
8.
A close, long-term relationship between two different species is called _____.
symbiosis
competition
a biome
a population
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Part of 4. Genetics, Variation and Interdependence — see every lesson and quiz in this unit.
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