Chromosomes and genes — Paper 1 · IGCSE Sciences - Co-ordinated (Double) 0654

11 What is an allele? A a pair of identical genes B one of the forms of a gene C the genetic make-up of a nucleus D the result of two gametes fusing

1 marks

Answer: B

This question in 0654/11 Oct/Nov 2011

12 What is an allele? A a pair of identical genes B one of the forms of a gene C the genetic make-up of a nucleus D the result of two gametes fusing

1 marks

Answer: B

This question in 0654/12 Oct/Nov 2011

13 What is an allele? A a pair of identical genes B one of the forms of a gene C the genetic make-up of a nucleus D the result of two gametes fusing

1 marks

Answer: B

This question in 0654/13 Oct/Nov 2011

11 The alleles for a particular character are H and h. Which term describes an organism whose genotype is HH? A heterozygous B homozygous C phenotype D recessive

1 marks

Answer: B

This question in 0654/13 Oct/Nov 2013

12 What does a human male inherit from his father? A an X allele B an X sperm C a Y chromosome D a Y gene

1 marks

Answer: C

This question in 0654/12 May/June 2014

11 Which statements about X chromosomes are correct? present in present in body cells in body cells of carry genes males females A v Jv v B v x v Cc v x x D x v x

1 marks

Answer: A

This question in 0654/11 Oct/Nov 2014

12 Which statements about X chromosomes are correct? present in present in body cells in body cells of carry genes males females A v Jv v B v x v Cc v x x D x v x

1 marks

Answer: A

This question in 0654/12 Oct/Nov 2014

11 Which statement about human gametes is correct? A 50% of egg cells contain a Y chromosome. B 50% of sperm cells contain a Y chromosome. C 100% of egg cells contain a Y chromosome. D 100% of sperm cells contain a Y chromosome.

1 marks

Answer: B

This question in 0654/13 Oct/Nov 2014

12 Which statements about X chromosomes in humans are correct? present in present in body cells in body cells of carry genes males females v v x «KX v x v x x v

1 marks

Answer: A

This question in 0654/11 Oct/Nov 2017

12 Which statements about X chromosomes in humans are correct? present in present in body cells in body cells of carry genes males females A v v v B v x v Cc J x x D x v x

1 marks

Answer: A

This question in 0654/12 Oct/Nov 2017

12 Which statements about X chromosomes in humans are correct? present in present in body cells in body cells of carry genes males females A v v v B v x v Cc J x x D x v x

1 marks

Answer: A

This question in 0654/13 Oct/Nov 2017

11 What contains only the information to produce a specific protein? A chromosome B cytoplasm C gene D nucleus

1 marks

Answer: C

This question in 0654/11 Oct/Nov 2018

11 Which sex chromosomes need to be present in a sperm cell to produce a male zygote? A X only B Y only C XX D XY

1 marks

Answer: B

This question in 0654/12 May/June 2019

11 Which sex chromosomes need to be present in a sperm cell to produce a male zygote? A X only B Y only C XX D XY

1 marks

Answer: B

This question in 0654/13 May/June 2019

11 Which statement about human gametes is correct? A Only 50% of egg cells contain an X chromosome. B Only 50% of sperm cells contain a Y chromosome. C 100% of egg cells contain a Y chromosome. D 100% of sperm cells contain an X chromosome.

1 marks

Answer: B

This question in 0654/12 Oct/Nov 2019

11 In humans, which combination of sex chromosomes from the ovum and sperm would result in a female? ovum sperm A X X B X Y C Y X D Y Y

1 marks

Answer: A

This question in 0654/13 Oct/Nov 2020

11 Which statement about human gametes is correct? A There is an X chromosome in all egg cells. B There is a Y chromosome in all egg cells. C There is an X chromosome in all sperm cells. D There is a Y chromosome in all sperm cells.

1 marks

Answer: A

This question in 0654/12 Feb/March 2021

11 Which row is correct for the inheritance of sex in humans? female male A XX XY B XY XX C YY XX D XX YY

1 marks

Answer: A

This question in 0654/12 May/June 2021

11 Which row is correct for the inheritance of sex in humans? female male A XX XY B XY XX C YY XX D XX YY

1 marks

Answer: A

This question in 0654/13 May/June 2021

11 Which statement is correct? A An allele is a version of a gene. B DNA is only found in gametes. C A gene is a length of DNA that codes for fats. D Cells of human males contain two X chromosomes.

1 marks

Answer: A

This question in 0654/12 Feb/March 2022

11 Which sex chromosomes are found in a healthy male human? A XO B XX C XY D YY

1 marks

Answer: C

This question in 0654/11 Oct/Nov 2022

11 In terms of the alleles present, which word describes the genetic make-up of an organism? A dominant B genotype C phenotype D recessive

1 marks

Answer: B

This question in 0654/12 Feb/March 2023

11 The diagram shows eggs and sperm containing sex chromosomes. 1 2 3 4 egg X X X X Y Y 5 6 7 8 sperm X Y X X X Y Which row gives the correct combination of sex chromosomes for a male and female offspring? male female offspring offspring A 1 and 8 3 and 7 B 2 and 6 2 and 5 C 3 and 8 1 and 7 D 4 and 6 2 and 5

1 marks

Answer: B

This question in 0654/11 May/June 2023

11 Which combination of sex chromosomes are present in the body cells of a human male? A XX B XY C Y only D YY

1 marks

Answer: B

This question in 0654/13 Oct/Nov 2023

11 Which statement describes a heterozygous genotype? A not pure breeding with two different alleles B not pure breeding with two identical alleles C pure breeding with two different alleles D pure breeding with two identical alleles

1 marks

Answer: A

This question in 0654/12 May/June 2024

11 Which statement describes a heterozygous genotype? A not pure breeding with two different alleles B not pure breeding with two identical alleles C pure breeding with two different alleles D pure breeding with two identical alleles

1 marks

Answer: A

This question in 0654/13 May/June 2024