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HIA International — Grade 8

Unit 1: Photosynthesis and the carbon cycle

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Unit 2: Properties of materials

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Unit 3: Forces and energy

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Unit 4: Maintaining life

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Unit 5: Reactivity

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Unit 6: Sound and space

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Unit 7: Genes and inheritance

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Unit 8: Rates of reaction

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Unit 9: Electricity

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Quiz

Gametes And Inheritance – Quiz

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Gametes And Inheritance HIA Science quiz: free practice for HIA International. Work through this Gametes And Inheritance HIA Science quiz and get instant feedback on every answer. If you get stuck, review the 25.6 Gametes And Inheritance – Notes lesson. More practice: HIA International — all units. Syllabus: Cambridge Lower Secondary programme.

  • Questions count: 50
  • Passing grade: A-
  • Time limit:
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1.
How many chromosomes are in a human sperm cell?
46
92
1
23
2.
What is formed at fertilisation?
A zygote
A chromosome
A gamete
An allele
3.
Why do offspring differ from their parents?
They have more chromosomes
They grow in a different place
Their genes are all new
They receive a mixture of alleles from both parents
4.
What is a gamete?
A sex cell: sperm in males, egg in females
A type of chromosome
A fertilised egg
A body cell
5.
What is fertilisation?
The joining of a sperm nucleus with an egg nucleus
The division of a body cell
The making of sperm
The growth of a baby
6.
What is an allele?
A zygote
A type of gamete
A whole chromosome
One of the different versions of the same gene
7.
Why do gametes have half the normal chromosome number?
So that fertilisation restores the full number
To stop fertilisation
So they are larger
So they can swim faster
8.
What fraction of your genes came from your mother?
None
All
Half
A quarter
9.
Where are sperm made?
In the zygote
In the ovaries
In the testes
In the oviduct
10.
Where are eggs made?
In the ovaries
In the stomach
In the testes
In the zygote
11.
Why is an egg much larger than a sperm?
It has a tail
It needs to swim
It has more chromosomes
It carries food stores (yolk) for early growth
12.
How does a sperm reach the egg?
It floats in air
It swims using its tail
It is carried by the blood
It is moved by the ovaries
13.
A cat's body cells have 38 chromosomes. How many are in a cat's egg cell?
76
9
19
38
14.
In the fertilisation diagram, how many chromosomes are in the zygote?
Dr Dabour Hub Academy - figure 1
23
92
46
0
15.
In the diagram of the sperm and egg, which label shows the part that helps the sperm swim?
Dr Dabour Hub Academy - figure 2
R
Q
P
S
16.
In the diagram, which labels show the nuclei, each carrying 23 chromosomes?
Dr Dabour Hub Academy - figure 3
R and S
Q and S
P and R
P and Q
17.
What does part S of the egg in the diagram contain that the sperm lacks?
Dr Dabour Hub Academy - figure 4
A food store to support early growth
A cell wall
A tail
More chromosomes
18.
Using the bar chart, how many chromosomes are in a fruit fly gamete?
Dr Dabour Hub Academy - figure 5
8
2
4
16
19.
What pattern does the bar chart show for every organism?
Dr Dabour Hub Academy - figure 6
There is no pattern
The numbers are the same
The gamete has exactly half the chromosomes of a body cell
The gamete has double
20.
The coin model uses each coin as a parent's allele. Using the bar chart, about what fraction of results had one of each?
Dr Dabour Hub Academy - figure 7
About a quarter
About half
None
About three quarters
21.
Why was the coin toss repeated 100 times rather than 4 times?
Dr Dabour Hub Academy - figure 8
Fewer trials are more accurate
Coins wear out after 4 tosses
More trials give results closer to the expected pattern
The model needs no repeats
22.
What is a limitation of using coins to model inheritance?
Dr Dabour Hub Academy - figure 9
Coins are too heavy
Coins cannot land on heads
The coins show exactly how babies look
Real genes and alleles are more complex than two-sided coins
23.
Using the graph, how many cells are there 36 hours after fertilisation?
Dr Dabour Hub Academy - figure 10
4
36
16
8
24.
Following the pattern in the graph, how many cells will there be at 60 hours?
Dr Dabour Hub Academy - figure 11
24
32
64
20
25.
What is the third step in the flow chart?
Dr Dabour Hub Academy - figure 12
The zygote divides
A sperm meets an egg
The two nuclei fuse
Gametes are made
26.
The diagram shows a family. Why do the three children look different from each other?
Dr Dabour Hub Academy - figure 13
They have different parents
Each child received a different mix of alleles from the parents
They received no genes from the father
They have more chromosomes than their parents
27.
Using the bar chart, how many times wider is the egg than a body cell?
Dr Dabour Hub Academy - figure 14
5 times
10 times
2 times
20 times
28.
Use the table. Which cell has a full set of chromosomes, mixed from two parents?
Zygote
None
Egg
Sperm
29.
Use the table. Which cell has almost no food store?
Body cell
Sperm
Egg
Zygote
30.
Use the table. What is the missing number for the horse zygote?
64
16
32
128
31.
Use the table. Which animal's sex cells contain 24 chromosomes?
Human
Horse
Dog
Potato
32.
A student's notes contain one mistake. Which row?
Zygote - 46 chromosomes
Egg - 46 chromosomes
Body cell - 46 chromosomes
Sperm - 23 chromosomes
33.
Use the table. What is the percentage of 'one of each' results?
100%
75%
25%
50%
34.
Use the table of class coin results. Which group's result is anomalous?
Group 2
Group 4
Group 3
Group 1
35.
Use the table. How does a zygote form?
By ordinary division
By fertilisation
In the testes
In the ovaries
36.
Identical twins form when one zygote splits in two. Why are they genetically identical?
Both came from the same zygote with the same alleles
Each received new genes
They had different fathers
They grew in different places
37.
Non-identical twins come from two eggs fertilised by two sperm. Why are they genetically different?
They share the same zygote
Each egg and sperm carries a different mix of alleles
They have no genes
Their chromosomes are identical
38.
A student wants to model how alleles combine at fertilisation. Which model is best?
Put cards for each parent's two alleles in bags, draw one from each bag, record the pair, and repeat many times
Draw one card only once
Flip one coin once
Use one bag with all cards and draw four at a time
39.
Fertilisation restores the full chromosome number, 46 in humans. True or false?
True
True, but only in eggs
False, it halves it
False
40.
Half your genes come from each parent. True or false?
True
False
False, all come from the father
False, all come from the mother
41.
A sperm cell has a large yolk store. True or false?
True, larger than the egg
False, it has a cell wall
True
False
42.
Brothers and sisters with the same parents are genetically identical (unless identical twins). True or false?
True
True, they share all alleles
False
True, but only brothers
43.
Alleles are different versions of the same gene. True or false?
True, but only in plants
False
False, they are chromosomes
True
44.
A species with 16 chromosomes in its gametes has 32 in its body cells. True or false?
False, it has 16
False
True
False, it has 8
45.
If gametes had the full number of chromosomes, the number would double each generation. True or false?
False, it would stay the same
True
False, it would halve
False
46.
The single cell formed at fertilisation is the _____.
zygote
allele
sperm
gamete
47.
A female gamete is an _____.
ovary
zygote
egg
sperm
48.
A dog egg has 39 chromosomes, so a dog zygote has _____.
19
78
156
39
49.
Which pairing of cell and where it is made is correct?
Egg - testes
Sperm - ovaries
Zygote - ovaries
Sperm - testes
50.
Match the term to its description: Inherited characteristic
A feature passed from parents to offspring through genes
A version of a gene
The joining of nuclei
A sex cell
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Part of Unit 7: Genes and inheritance — see every lesson and quiz in this unit.
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