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

16.2.4 Predicting Inheritance- Test Crosses – Exam questions

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  • Questions count: 5
  • Passing grade: B+
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1.
A dihybrid test cross gives mostly parental phenotypes and few recombinants. The best explanation is:
Epistasis
Codominance
The genes are autosomally linked
Independent assortment
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.
Two genes are located very close together on the same chromosome. Which statement is most likely correct?
They are inherited together and do not follow the law of independent assortment
They assort independently like genes on different chromosomes
They can never be inherited in the same gamete
Crossing over between them is frequent, so they always separate
5.

A test cross is used to

produce clones
identify an unknown genotype by crossing with a homozygous recessive
find the number of chromosomes
make new alleles
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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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