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

7.1.6 The Chi-squared Test – Exam questions

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  • Questions count: 4
  • Passing grade: B+
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1.
Degrees of freedom for a 3:1 chi-squared test:
1
2
3
4
2.
Degrees of freedom for a chi-squared test with four phenotype classes is:
3
4
2
1
3.
Which statement best describes Chi-squared test?
A statistical test comparing observed with expected frequencies to decide whether any difference is due to chance.
The location of a gene on a sex chromosome (usually the X), so that inheritance patterns differ between males and females.
A length of DNA at a particular locus on a chromosome that codes for a polypeptide or functional RNA.
A situation in which both alleles in a heterozygote are fully expressed in the phenotype.
4.

The chi-squared test is used in genetics to

test whether observed and expected ratios differ significantly
calculate allele frequency
find the mean
measure variation
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Part of 7. Genetics, Populations, Evolution and Ecosystems (A Level only) — see every lesson and quiz in this unit.
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