A LEVEL BIOLOGY INHERITANCE

Last updated: 28/04/2022

AQA A-Level Biology Inheritance A LEVEL BIOLOGY INHERITANCE

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Question 1 of 50

1. Question
In the Hardy-Weinberg equation, what does p represent?
- the frequency of the dominant allele
- the frequency of the recessive allele
- the number of organisms with the recessive allele
- the number of organisms with the dominant allele
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Question 2 of 50

2. Question
What is a haploid nucleus?
- a nucleus with one set of chromosomes
- a nucleus with two sets of chromosomes
- a nucleus with 46 chromosomes
- a nucleus with 23 chromosomes
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Question 3 of 50

3. Question
Which term describes an organism that carries two different alleles?
- heterozygous
- homozygous
- dominant
- codominant
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Question 4 of 50

4. Question
In the Hardy-Weinberg equation, what does q represent?
- the frequency of the recessive allele
- the frequency of the dominant allele
- the number of organisms with the recessive allele
- the number of organisms with the dominant allele
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Question 5 of 50

5. Question
What is a diploid nucleus?
- a nucleus with two sets of chromosomes
- a nucleus with one set of chromosomes
- a nucleus with 46 chromosomes
- a nucleus with 23 chromosomes
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Question 6 of 50

6. Question
Which term describes a person carrying an allele which is not expressed in the phenotype but can be passed onto offspring?
- carrier
- homozygous
- codominant
- homozygous
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Question 7 of 50

7. Question
In the Hardy-Weinberg equation, what does p + q =?
- 1
- 2pq
- 0.1
- pq
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Question 8 of 50

8. Question
What are codominant alleles?
- alleles that are both expressed in the phenotype
- alleles that are only expressed in the phenotype if there are two copies present
- alleles that are always expressed in the phenotype
- a different version of a gene
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Question 9 of 50

9. Question
Which term describes cells that have two sets of chromosomes?
- diploid
- dominant
- haploid
- homozygous
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Question 10 of 50

10. Question
In the Hardy-Weinberg equation, what does p squared represent?
- the frequency of the homozygous dominant genotype
- the frequency of the homozygous recessive genotype
- the frequency of the heterozygous genotype
- the frequency of all the possible genotypes
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Question 11 of 50

11. Question
In the Hardy-Weinberg equation, what represents the frequency of the dominant allele?
- p
- q
- 2pq
- p squared
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Question 12 of 50

12. Question
Which term describes gamete cells, because they have one set of chromosomes?
- haploid
- diploid
- homozygous
- recessive
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Question 13 of 50

13. Question
In the Hardy-Weinberg equation, what does q squared represent?
- the frequency of the homozygous recessive genotype
- the frequency of the homozygous dominant genotype
- the frequency of the heterozygous genotype
- the frequency of all the possible genotypes
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Question 14 of 50

14. Question
In the Hardy-Weinberg equation, what represents the frequency of the recessive allele?
- q
- p
- 2pq
- q squared
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Question 15 of 50

15. Question
Which term describes inheritance of a characteristic controlled by a single gene?
- monohybrid inheritance
- dihybrid inheritance
- autohybrid inheritance
- trihybrid inheritance
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Question 16 of 50

16. Question
In the Hardy-Weinberg equation, what does 2pq represent?
- the frequency of the heterozygous genotype
- the frequency of the homozygous recessive genotype
- the frequency of the homozygous dominant genotype
- the frequency of all the possible genotypes
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Question 17 of 50

17. Question
Which term describes the alleles that an organism has?
- genotype
- phenotype
- homozygous
- heterozygous
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Question 18 of 50

18. Question
Which term describes inheritance of a characteristic controlled by two genes?
- dihybrid inheritance
- monohybrid inheritance
- autohybrid inheritance
- trihybrid inheritance
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Question 19 of 50

19. Question
Which of these conditions must exist for Hardy-Weinberg predictions to be true?
- large population, no migration, no mutations, no natural selection, random mating
- large population, migration, no mutations, no natural selection, random mating
- large population, no migration, no mutations, no natural selection, no random mating
- small population, no migration, no mutations, no natural selection, random mating
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Question 20 of 50

20. Question
Which term describes characteristics expressed in an organism?
- phenotype
- genotype
- homozygous
- heterozygous
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Question 21 of 50

21. Question
Which statistical test is used to check the results of genetic crosses?
- chi-squared
- spearman rank
- student t-test
- 95% confidence limits
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Question 22 of 50

22. Question
What is a gene?
- a sequence of bases on DNA that code for a protein
- a sequence of bases on DNA that code for an amino acid
- a sequence of amino acids on DNA that code for a protein
- different versions of an allele
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Question 23 of 50

23. Question
How do you calculate degrees of freedom for the chi-squared test?
- number of classes – 1
- number of classes + 1
- number of classes
- number of classes – 2
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Question 24 of 50

24. Question
What is an allele?
- different versions of a gene
- a sequence of bases on DNA that code for a protein
- different versions of a chromosome
- different versions of an amino acid
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Question 25 of 50

25. Question
How are dominant alleles shown in genetic diagrams?
- capital letter
- lower case letter
- italic letters
- bold letters
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Question 26 of 50

26. Question
Which term describes a sequence of bases on DNA that code for a protein?
- gene
- phenotype
- genotype
- allele
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Question 27 of 50

27. Question
What is the definition of genotype?
- the alleles an organism has
- the characteristics expressed by an organism
- different versions of a gene
- a sequence of bases on DNA that code for a protein
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Question 28 of 50

28. Question
How many chromosomes do human body cells contain?
- 46
- 23
- 48
- 44
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Question 29 of 50

29. Question
How are recessive alleles shown in genetic diagrams?
- lower case letter
- capital letter
- italic letters
- bold letters
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Question 30 of 50

30. Question
What is the definition of phenotype?
- the characteristics expressed by an organism
- the alleles an organism has
- different versions of a gene
- a sequence of bases on DNA that code for a protein
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Question 31 of 50

31. Question
Which term describes a different version of a gene?
- allele
- phenotype
- recessive
- dominant
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Question 32 of 50

32. Question
How many chromosomes do human body gametes contain?
- 23
- 46
- 48
- 23 pairs
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Question 33 of 50

33. Question
What ratio of characteristics will always be shown in a monohybrid cross with two heterozygous parents?
- 3:1 dominant to recessive
- 2:1 recessive to dominant
- 3:1 recessive to dominant
- 2:1 dominant to recessive
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Question 34 of 50

34. Question
If a heterozygous blood group A is crossed with a heterozygous blood group B, what are the possible offspring blood groups?
- A, B, AB, O
- only A
- A and B
- only B
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Question 35 of 50

35. Question
What are recessive alleles?
- alleles that are only expressed in the phenotype if there are two copies present
- different versions of a gene
- alleles that are both expressed in the phenotype
- alleles that are always expressed in the phenotype
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Question 36 of 50

36. Question
Which term describes an allele that is always expressed in the phenotype if it is present?
- dominant
- recessive
- codominant
- homozygous
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Question 37 of 50

37. Question
If the ratio of charcteristics is 3:1 dominant to recessive, what is the chance the offspring will have the recessive characteristic?
- 25%
- 75%
- 33%
- 5%
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Question 38 of 50

38. Question
Which term describes the chromosomes that are not the sex chromosomes?
- autosomal
- automatic
- chromosomal
- automosal
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Question 39 of 50

39. Question
What are dominant alleles?
- alleles that are always expressed in the phenotype
- alleles that are only expressed in the phenotype if there are two copies present
- none of these
- different versions of a gene
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Question 40 of 50

40. Question
Which term describes alleles that are only expressed in the phenotype if there are two copies present?
- recessive
- dominant
- codominant
- heterozygous
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Question 41 of 50

41. Question
In the ABO blood system which allele is recessive?
- the allele for blood group O
- the allele for blood group A
- the allele for blood group B
- the allele for blood group AB
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Question 42 of 50

42. Question
Which term describes when an allele of one gene masks the expressionn of the alleles of other genes?
- epistasis
- dominance
- codominance
- sex-linkage
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Question 43 of 50

43. Question
What is a locus?
- the position of a gene on a chromosome
- a sequence of bases on DNA that code for a protein
- a different version of a gene
- an insect
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Question 44 of 50

44. Question
Which term describes alleles that are both expressed in the phenotype?
- codominant
- recessive
- dominant
- heterozygous
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Question 45 of 50

45. Question
Which term describes a group of similar organisms that can reproduce to give fertile offspring?
- species
- population
- genus
- family
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Question 46 of 50

46. Question
What does homozygous mean?
- an organism that carries two copies of the same allele
- an organism that carries two different alleles
- an allele that is always expressed in the phenotype if it is present
- alleles that are only expressed in the phenotype if there are two copies present
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Question 47 of 50

47. Question
Which term describes the position of a gene on a chromosome?
- locus
- genotype
- phenotype
- allele
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Question 48 of 50

48. Question
What principle predicts that allele frequencies won’t change from one generation from the next?
- Hardy-Weinberg
- Handy-Weinberg
- Hardy-Wineburg
- Hardy-Weinberger
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Question 49 of 50

49. Question
What does heterozygous mean?
- an organism that carries two different alleles
- an organism that carries two copies of the same allele
- an allele that is always expressed in the phenotype if it is present
- alleles that are only expressed in the phenotype if there are two copies present
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Question 50 of 50

50. Question
Which term describes an organism that carries two copies of the same allele?
- homozygous
- heterozygous
- codominant
- locus
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