Year 9 - Genetics

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IGCSE Biology Quiz on Year 9 - Genetics, created by Archana RELAN on 23/02/2020.
Archana RELAN
Quiz by Archana RELAN, updated more than 1 year ago
Archana RELAN
Created by Archana RELAN about 4 years ago
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Resource summary

Question 1

Question
These two sisters are identical twins. The reason why they look alike is because they have
Answer
  • the same alleles and a similar diet
  • the same alleles and a different diet
  • different alleles and a similar diet
  • different alleles and a different diet

Question 2

Question
These two sisters are identical twins. The sisters found out that all their features were controlled by
Answer
  • dominant alleles only
  • recessive alleles only
  • dominant and recessive alleles
  • neither dominant nor recessive alleles

Question 3

Question
These two sisters are identical twins. The sisters have a brother with cystic fibrosis. This meant he often had
Answer
  • skin infections
  • lung infections
  • eye infections
  • throat infections

Question 4

Question
These two sisters are identical twins. The sisters have a brother with cystic fibrosis. Their brother decided that he would not have any children of his own because the probability of him passing on the allele for cystic fibrosis was
Answer
  • 100%
  • 75%
  • 50%
  • 25%

Question 5

Question
Our body is made up of different cells. Each cell contains structures that help to keep the cell alive. Part X on the diagram shows a unit of inheritance. A unit of inheritance is
Answer
  • a gene
  • dominant
  • recessive
  • a gamete

Question 6

Question
The cubs born to the lions will inherit
Answer
  • all their genes from their mother
  • all their genes from their father
  • an equal number of genes from each parent
  • no genes from either parent

Question 7

Question
Some organisms produce clones. Clones are
Answer
  • identical to both parents
  • identical to neither parent
  • identical to one parent
  • identical to another species

Question 8

Question
Where in the cell are chromosomes found?
Answer
  • cell membrane
  • cytoplasm
  • chloroplast
  • nucleus

Question 9

Question
Genes are made of
Answer
  • alleles
  • chromosomes
  • DNA
  • gametes

Question 10

Question
Normal cells divide to enable the growth and repair of tissue. This involves mitosis to produce
Answer
  • 4 identical nuclei
  • 2 identical nuclei
  • 4 non-identical nuclei
  • 2 non identical nuclei

Question 11

Question
Which is not true?
Answer
  • Genes are made from DNA
  • Genes are made from chromosomes
  • Genes are found in the nucleus
  • Genes control cell activity

Question 12

Question
Chromosomes are found in the part of the cell labelled Z. What is Z?
Answer
  • cell membrane
  • chlorophyll
  • cytoplasm
  • nucleus

Question 13

Question
How many chromosomes are found in Z?
Answer
  • none
  • one
  • two
  • four

Question 14

Question
Police officers can gain information about criminals by collecting samples of blood from the crime scene. The information is analysed and compared to data they have on computer. Where is DNA found in a blood sample?
Answer
  • plasma
  • platelets
  • red blood cells
  • white blood cells

Question 15

Question
The diagram shows the inheritance of eye colour in a family. The allele for brown eyes is dominant (B) and the allele for blue eyes is recessive (b). Which of the following statements is true?
Answer
  • Lucy and Daniel both have blue eyes
  • Lucy and Daniel have different coloured eyes
  • Lucy and Daniel have the same coloured eyes
  • All the males in the family have brown eyes

Question 16

Question
The diagram below shows the inheritance of eye colour in a family. The allele for brown eyes is dominant (B) and the allele for blue eyes is recessive (b). What is the sex and eye colour of baby M?
Answer
  • male with brown eyes
  • male with blue eyes
  • female with brown eyes
  • female with blue eyes

Question 17

Question
The diagram below shows the inheritance of eye colour in a family. The allele for brown eyes is dominant (B) and the allele for blue eyes is recessive (b). In the family shown, Rachel has an identical twin. Rachel has brown eyes. Who is Rachel’s identical twin?
Answer
  • Sarah
  • Gary
  • Lucy
  • David

Question 18

Question
Complete each box by writing in A, T, C or G to show the bases of part of the double strand of DNA.
Answer
  • A
  • C
  • G
  • T
  • A
  • C
  • G
  • T
  • A
  • C
  • G
  • T
  • A
  • C
  • G
  • T
  • A
  • C
  • G
  • T
  • A
  • C
  • G
  • T

Question 19

Question
The allele for brown eyes (B) is dominant to the allele for blue eyes (b). People with brown eyes have at least one dominant allele. Complete the table.
Answer
  • BB
  • bB
  • bb
  • BB
  • bB
  • bb

Question 20

Question
Cystic fibrosis is an inherited disease where certain cells produce abnormal mucus. The allele for the disease is recessive. The diagram shows how cystic fibrosis was inherited in one family. How many of the children of A and B were homozygous dominant?
Answer
  • 1
  • 2
  • 3
  • 4

Question 21

Question
Cystic fibrosis is an inherited disease where certain cells produce abnormal mucus. The allele for the disease is recessive. The diagram shows how cystic fibrosis was inherited in one family. What is the phenotype of D?
Answer
  • Male without cystic fibrosis
  • Male with cystic fibrosis
  • Female without cystic fibrosis
  • Female with cystic fibrosis

Question 22

Question
Cystic fibrosis is an inherited disease where certain cells produce abnormal mucus. The allele for the disease is recessive. The diagram shows how cystic fibrosis was inherited in one family. What is the probability of F and G having a child with cystic fibrosis?
Answer
  • 1/2
  • 1/3
  • 1/4
  • 1/5

Question 23

Question
In tomato seedlings, the first leaves can be either green (filled in) or yellow (not filled in). The colour of the leaves is controlled by one gene with two alleles. One allele is dominant and one allele is recessive. Two tomato plants were crossed. The seeds from this cross were grown. The results were obtained in the picture. Calculate the ratio of the two phenotypes.
Answer
  • 1/2
  • 1/3
  • 1/4
  • 1/5

Question 24

Question
Plant breeders wanted to produce a better variety of tomato by selective breeding. Two plants, of the varieties Tangella and Piranto, were crossed. Information about each variety of tomato is shown in the table. Which features of Piranto would the plant breeders wish to see in the new breed of tomato?
Answer
  • Yield
  • Flavour
  • Resistance
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