Chromosomes, genes and proteins — Paper 1 · IGCSE Biology (9-1) 0970

34 What will cause the rate of mutation to increase? A increase in exposure to ionising radiation B increase in genetic variation in a population C increase in phenotypic variation in a population D increase in the rate of reproduction

1 marks

Answer: A

This question in 0970/11 May/June 2018

29 What is the transmission of genetic information from generation to generation known as? A cell division B inheritance C meiosis D mitosis

1 marks

Answer: B

This question in 0970/12 Oct/Nov 2018

30 The diagram shows the chromosomes in one human cell. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 XX What can be concluded from the chromosomes in this cell? A The cell is from a man. B The cell is from a woman. C There are only 23 chromosomes per cell. D There are only 46 pairs of chromosomes per cell.

1 marks

Answer: B

This question in 0970/12 Oct/Nov 2018

32 Which human characteristics are inherited? earlobe eye skin anguage shape colour colour A J J x J B J J x x Cc v x x Jv D x J J J key J = inherited X = not inherited

1 marks

Answer: A

This question in 0970/11 May/June 2019

33 A rabbit has 44 chromosomes in each of its body cells. Which row correctly describes the gamete cells? number of gametes compared chromosomes to body cells A 22 genetically identical B 22 genetically different C 44 genetically identical D 44 genetically different

1 marks

Answer: B

This question in 0970/11 May/June 2019

31 What is defined as a length of DNA that codes for a protein? A amino acid B chromosome C gene D nucleus

1 marks

Answer: C

This question in 0970/11 May/June 2020

4 The diagram shows a plant cell. A biologist wants to find out the number of chromosomes it contains. Which labelled part should be examined more closely? B C A D

1 marks

Answer: A

This question in 0970/12 May/June 2020

32 Which statement about the human sex chromosomes is correct? A Females have an X chromosome and a Y chromosome. B Females have two Y chromosomes. C Males and females have at least one X chromosome. D Males and females have at least one Y chromosome.

1 marks

Answer: C

This question in 0970/12 May/June 2020

34 The graph shows the masses of two different types of tomato. type 1 type 2 number of tomatoes 0 20 40 60 80 100 120 140 160 180 200 220 240 mass / g What can be concluded from the graph? A Genes do not affect the mass of tomatoes. B Type 1 tomatoes show continuous variation. C Type 2 tomatoes are sometimes smaller than type 1 tomatoes. D Type 2 tomatoes show discontinuous variation.

1 marks

Answer: B

This question in 0970/12 May/June 2020

33 What is the transmission of genetic information from generation to generation called? A fertilisation B inheritance C meiosis D reproduction

1 marks

Answer: B

This question in 0970/11 May/June 2021

30 Fertilisation is defined as the fusion of the ……X…… of two gametes to form a ……Y…… . Which row completes the sentence? X Y A alleles sex cell B alleles zygote C nuclei sex cell D nuclei zygote

1 marks

Answer: D

This question in 0970/12 Oct/Nov 2021

33 Which of these determine the sex of humans? A X and Y genes B X and Y alleles C X and Y chromosomes D X and Y genotypes

1 marks

Answer: C

This question in 0970/12 Oct/Nov 2021

33 Beak shape in birds is controlled by genes passed from the parent birds to their offspring. What is this an example of? A selection B fertilisation C mitosis D inheritance

1 marks

Answer: D

This question in 0970/11 May/June 2022

34 A student used a diagram to explain the inheritance of sex in humans. mother father   eggs sperm   1 2 Which statements should she use to complete boxes 1 and 2? box 1 box 2 A all have an X chromosome half have an X chromosome and half have a Y chromosome B all have a Y chromosome half have an X chromosome and half have a Y chromosome C half have an X chromosome and all have an X chromosome half have a Y chromosome D half have an X chromosome and all have a Y chromosome half have a Y chromosome

1 marks

Answer: A

This question in 0970/11 May/June 2022

35 What can increase the genetic variation in a species? A growth B malnutrition C mitosis D mutation

1 marks

Answer: D

This question in 0970/12 Oct/Nov 2022

33 What is defined as a length of DNA that codes for a protein? A amino acid B antibody C chromosome D gene

1 marks

Answer: D

This question in 0970/11 May/June 2023

35 Which term is a genetic change? A allele B genotype C mutation D phenotype

1 marks

Answer: C

This question in 0970/11 May/June 2023

31 Which human characteristics are inherited? 0 0O WwW > blood group Ko 4 eye colour ~ KOK language \ & \& x Sex Q 48M key J = inherited X = not inherited

1 marks

Answer: A

This question in 0970/12 May/June 2023

34 A genetic cross between two organisms may be shown as Tt  Tt. What does T represent? A a dominant allele B a dominant chromosome C a recessive allele D a recessive chromosome

1 marks

Answer: A

This question in 0970/12 Oct/Nov 2023

33 What describes an allele? A an alternative form of a chromosome made of DNA B an alternative form of a chromosome made of protein C an alternative form of a gene made of DNA D an alternative form of a gene made of protein

1 marks

Answer: C

This question in 0970/12 May/June 2024

36 What do genes code for? A fats B proteins C starch D sugars

1 marks

Answer: B

This question in 0970/12 Oct/Nov 2024

32 What are alternative forms of genes called? A alleles B chromosomes C genotypes D phenotypes

1 marks

Answer: A

This question in 0970/11 May/June 2025

29 What is an alternative form of a gene called? A allele B chromosome C genotype D protein

1 marks

Answer: A

This question in 0970/12 May/June 2025

28 What does a gene code for? A a carbohydrate B a fat C a protein D DNA

1 marks

Answer: C

This question in 0970/12 Oct/Nov 2025