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Course: Alhussan Biology — Stage 9
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Alhussan Biology — Stage 9

Chapter 9: Plants and Photosynthesis

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Chapter 10: Excretion in Humans

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Chapter 11: Human Genetics and Development

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Chapter 12: The Carbon Cycle and Climate Change

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Chapter 13: Variation and Natural Selection

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Quiz

Biology 11.3 Boy or girl? Sex inheritance in humans — Quiz

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  • Questions count: 50
  • Passing grade: B+
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1.
Boys born per 100 girls in different years. At what value of "Year" is "Boys per 100 girls" greatest?
Dr Dabour Hub Academy - figure 1
2019
2020
2018
2016
2.
True or false? Some eggs carry a Y chromosome.
True
False
3.
True or false? The Y chromosome is the larger one.
True
False
4.
A family has 4 children. How many boys are expected?
2
1
20
4
5.
Each chromosome carries about 1000 genes. About how many genes are on 46 chromosomes?
23,000
46,000
22
1046
6.
Which parent's gamete decides the sex of the baby?
Both equally
The mother's egg
Neither
The father's sperm
7.
A hospital had 520 boys and 470 girls born. What percentage were boys?
47.5%
50.0%
52.5%
110.6%
8.
True or false? Gametes are made by mitosis.
True
False
9.
Which statement is NOT correct?
All 23 pairs decide sex.
Matching chromosomes in a pair carry the same genes.
Gametes are made by meiosis.
The 23rd pair determines sex.
10.
What are the sex chromosomes of a human male?
XY
XX
YY
XXY
11.
True or false? Half the sperm carry an X and half carry a Y.
True
False
12.
A family has 10 children. How many boys are expected?
1
2
10
5
13.
Which term matches this definition? “A grid showing possible offspring combinations.”
Allele
Ovaries
Second-hand smoke
Genetic diagram
14.
True or false? A child gets all genes from the father.
True
False
15.
Out of 500 births, how many girls are expected?
1000
125
250
500
16.
Which term matches this definition? “The smaller sex chromosome with few genes.”
Y chromosome
Umbilical cord
Chromosome
Specialisation
17.
Families with 4 children by number of boys. What is the value for 0?
Dr Dabour Hub Academy - figure 2
29
47
7
32
18.
Which is the correct definition of “X chromosome”?
A warm, controlled cot for premature babies.
The larger sex chromosome.
The embryo sinking into the uterus lining.
Cord linking the fetus to the placenta.
19.
True or false? The Y chromosome is larger than the X chromosome.
True
False
20.
Which statement is correct?
The chance of a girl is 25%.
Families always have equal boys and girls.
Half the sperm carry an X and half carry a Y.
A child gets all genes from the father.
21.
Out of 100 births, how many girls are expected?
200
50
100
25
22.
Which is the correct definition of “Meiosis”?
The smaller sex chromosome with few genes.
A defect of the developing spinal cord.
Division that halves chromosome number to make gametes.
An allele that shows only with two copies.
23.
The X chromosome is relatively ____.
large
absent
empty
small
24.
Births in a hospital in one year. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 3
A
B
C
D
25.
Families with 4 children by number of boys. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 4
A
B
C
D
26.
A family has 6 children. How many boys are expected?
2
1
6
3
27.
True or false? The sex of the baby depends on the sperm.
True
False
28.
The genetic diagram shows sex inheritance. What is the chance a child is a boy?
Dr Dabour Hub Academy - figure 5
100%
50%
25%
75%
29.
A hospital had 520 boys and 488 girls born. What percentage were boys?
106.6%
51.6%
48.4%
32.0%
30.
A family has 8 children. How many boys are expected?
2
1
4
8
31.
Each chromosome carries around ____ genes.
1
1000
10
100 000
32.
Each chromosome has about 1200 genes. About how many genes on 23 chromosomes?
52
27,600
13,800
1223
33.
Boys born per 100 girls in different years. Between which two values of "Year" did "Boys per 100 girls" change the most?
Dr Dabour Hub Academy - figure 6
2018 and 2019
2017 and 2018
2019 and 2020
2016 and 2017
34.
A hospital had 520 boys and 500 girls born. What percentage were boys?
104.0%
49.0%
51.0%
20.0%
35.
Which is the correct definition of “Y chromosome”?
The smaller sex chromosome with few genes.
A ball of dividing cells after fertilisation.
The amniotic sac breaking when labour starts.
A defect of the developing spinal cord.
36.
True or false? All 23 pairs decide sex.
True
False
37.
True or false? The chance of a girl is 25%.
True
False
38.
Each chromosome has about 800 genes. About how many genes on 23 chromosomes?
18,400
35
823
9200
39.
Which term matches this definition? “Has two X chromosomes.”
Allele
Fertilisation
Female
Genetic diagram
40.
Boys born per 100 girls in different years. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 7
A
B
C
D
41.
The genetic diagram shows sex inheritance. What is the chance that a child is a boy?
Dr Dabour Hub Academy - figure 8
75%
50%
25%
100%
42.
In the diagram, how many of the four combinations are girls?
Dr Dabour Hub Academy - figure 9
3
4
1
2
43.
A hospital had 512 boys and 500 girls born. What percentage were boys?
50.6%
102.4%
49.4%
12.0%
44.
True or false? The chance of a boy is about 50%.
True
False
45.
Matching chromosomes in a pair carry the same ____.
colours
genes
alleles always
names
46.
True or false? The Y chromosome has just a few genes.
True
False
47.
Every egg contains an ____ chromosome.
XY
Y
no
X
48.
Families with 4 children by number of boys. What is the total of all the values?
Dr Dabour Hub Academy - figure 10
135
109
122
47
49.
A family has 2 children. How many boys are expected?
1
4
10
2
50.
Each gamete contains ____ chromosomes.
1
46
23
22
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Part of Chapter 11: Human Genetics and Development — see every lesson and quiz in this unit.
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