1 The DNA in the nucleus of a cell could be stretched to over: a 2 mm b 2 cm c 2 km d 2 m
2 Humans are thought to have about: a 250 genes b 2500 genes c 25 000 genes d 250 000 genes.
3 The diploid number for a dog is 78. The haploid number would be: a 78 b 76 c 39 d 23
4 How many autosomal chromosomes do humans have? a 46 b 23 c 22 d 44
Oxford Big Ideas Science 3 ISBN 978 0 19 556453 2 © Oxford University Press Australia

5 The process of making a copy of DNA is called: a translation b transplantation c transcription d transpiration.
6 During which process is the information coded in mRNA transformed into a sequence of amino acids? a translation b transplantation c transcription d transpiration.
7 DNA replication takes place during which stage of mitosis? a interphase b prophase c metaphase d telophase.
8 The primary purpose of meiosis is: a to produce new skin cells b to produce gametes c for growth and repair d for DNA replication.
9 Which of the following is correct? a Mitosis occurs in normal body cells and produces cells with the diploid number of chromosomes. b Mitosis occurs in the sex cells and produces cells with the haploid number of chromosomes. c Mitosis occurs in the sex cells and produces cells with the diploid number of chromosomes. d Mitosis occurs in normal body cells and produces cells with the haploid number of chromosomes.
10 Which of the following is correct? a Meiosis occurs in normal body cells and produces cells with the diploid number of chromosomes. b Meiosis occurs in the sex cells and produces cells with the haploid number of chromosomes. c Meiosis occurs in the sex cells and produces cells with the diploid number of chromosomes. d Meiosis occurs in normal body cells and produces cells with the haploid number of chromosomes.
Oxford Big Ideas Science 3 ISBN 978 0 19 556453 2 © Oxford University Press Australia

11 Flamingos get their pink colouring from: a their mothers b their fathers c both their mothers and their fathers d none of the above.
12 Through his many experiments with pea plants, Gregor Mendel demonstrated: a that discrete units were inherited from one generation to the next, rather than a blending b that discrete units were blended when passed onto the next generation c that each trait was caused by one unit only d that it was a matter of chance which traits were passed onto the next generation.
13 A dominant trait is one that is expressed in a: a heterozygous individual where they have two of the same alleles, and that allele is expressed b heterozygous individual where they have two different alleles, but only one allele is expressed c homozygous individual where they have two different alleles, but only one allele is expressed d homozygous individual where they have two of the same alleles, and that allele is expressed.
14 The types of trait that cannot skip a generation are: a autosomal dominant and X-linked dominant b autosomal dominant and X-linked recessive c X-linked dominant and autosomal recessive d X-linked recessive and autosomal recessive.
15 Let us say that the gene that codes for normal-typ e wings in fruit flies has the symbol ‘N’ and the gene that codes for vestigial (stunted) wings has the symbol ‘n’. The genotype of heterozygous flies would be: a Nn b normal wings c NN d nn
16 Let us say that the gene that codes for normal-type wings in fruit flies has the symbol ‘N’ and the gene that codes for vestigial (stunted) wings has the symbol ‘n’. The genotype of homozygous normal wing flies would be: a Nn b normal wings c NN d nn
Oxford Big Ideas Science 3 ISBN 978 0 19 556453 2 © Oxford University Press Australia

17 In a cross between two heterozygous individuals, the chance of a heterozygous child is: a 25% b 50% c 75% d 100%
18 In a cross between a homozygous dominant individual and a homozygous recessive individual, the chance of a heterozygous child is: a 25% b 50% c 75% d 100%
19 The genotypes and phenotypes of the ABO blood group are as follows: genotype I A I A I A i I A I B I B I B I B i ii phenotype A A AB B B O
A male with blood group B and a female with blood group O have a child. The child is: a most likely to have blood group B b most likely to have blood group O c equally likely to have blood group B or blood group O d neither blood group B or O.
20 The genotypes and phenotypes of the ABO blood group are as follows: genotype I A I A I A i I A I B I B I B I B i ii
B O phenotype A A AB
From this information it is true to say that: a I A is the only dominant allele b I B is the only dominant allele c i is the only dominant allele d I A and I B are co-dominant alleles
B
Oxford Big Ideas Science 3 ISBN 978 0 19 556453 2 © Oxford University Press Australia

P
2
21 In this Punnett square how many different genotypes are there?
P
1
N n
N NN Nn n Nn nn a 2 b 3 c 4 d 8
22 A homozygous dominant individual is bred with a homozygous recessive individual. The next generation is expected to be: a all homozygous dominant b all homozygous recessive c all heterozygous d 50% homozygous recessive and 50% homozygous dominant.
23 All the major genes in humans responsible for susceptibility to disease: a have been identified for the last 50 years b have been identified for the last five years c are identified now d it is hoped will be identified in the next five to ten years.
24 Replacing a defective gene with the correct gene sequence is an example of: a genetic testing b gene therapy c nuclear transfer d DNA profiling.
25 The process of determining a person’s DNA sequence is known as: a genetic testing b gene therapy c nuclear transfer d DNA profiling.
Oxford Big Ideas Science 3 ISBN 978 0 19 556453 2 © Oxford University Press Australia