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Yr 11 Bio - Genetics SAC Revision

Total questions: 62

Worksheet time: 1hrs 12mins

Name
Class
Date
1.

a photograph or picture of chromosomes grouped in ordered pairs is a ______________

a)

pedigree

b)

Punnett Square

c)

Venn Diagram

d)

Karyotype

2.
Which sex chromosomes would indicate a typical human male?
a)
XX
b)
X
c)
XY
d)
XXY
3.

A normal human zygote should have _____ chromosomes inside.

a)

46

b)

23

c)

92

d)

64

4.

You are viewing a patients karyotype. You see 23 chromosomes total. There are no homologous chromosomes. Which type of cell are you viewing?

a)

Egg cell

b)

Zygote

c)

Skin cell

d)

White blood cell

5.
What is the gender of the individual whose karyotype is seen in the image?
a)
Male
b)
Female
6.
The results of the karyotype indicate that an individual has 3 chromosome #21. Which of the following genetic disorders do they have?
a)
Edwards Syndrome
b)
Patau's Syndrome
c)
Down's Syndrome
d)
Klinefelter's Syndrome
7.

Based on the karyotype, what is the sex of this baby?

a)

Male

b)

Female

8.
Is this Karyotype human?
a)
Yes
b)
No
c)
Impossible to Determine
9.
Which structure is labeled as A in the diagram?
a)
Centromere
b)
Chromosome
c)
Sister chromatids
10.
Which structure is labeled as B in the diagram?
a)
Centromere
b)
Chromosome
c)
Sister chromatids
11.
Which structure is labeled as C in the diagram?
a)
Centromere
b)
Chromosome
c)
Sister chromatids
12.
A pair of identical chromosomes shown in a karyotype, one inherited from mom, and one inherited from dad are called
a)
sister chromotids
b)
centromeres
c)
homologous chromosomes
d)
autosomes
13.

If the Diploid number for carrots is 18, the haploid number is

a)

18

b)

9

c)

27

d)

36

14.
Which of the following would be considered a Gamete cell?
a)
Egg Cell
b)
Sperm Cell
c)
Both of these
d)
None of these
15.

A _______ is a segment of DNA that codes for a specific protein or RNA molecule.

a)

gene

b)

gamete

c)

chromosome

d)

chromatid

16.

Chromosomes that are paired by size and content are called _______ chromosomes.

a)

homeostasis

b)

homologous

c)

matching

d)

sister

17.

Cells that contain only ONE set of chromosomes are called ________ (n).

a)

diploid

b)

polyploid

c)

triploid

d)

haploid

18.

The chromosomes that are not involved in determining the sex of an individual are called __________.

a)

sex chromosomes

b)

mutations

c)

autosomes

d)

homologous

19.

The 23rd pair of chromosomes that do determine the sex of an individual are called ___________.

a)

sex chromosomes

b)

autosomes

c)

homologous

d)

genes

20.

The 2 female sex chromosomes are ___.

a)

XY

b)

XX

21.

Down Syndrome is also known as _________.

a)

Trisomy 18

b)

Trisomy 21

c)

Monosomy X

d)

Trisomy 13

22.

Edward Syndrome is also known as __________.

a)

Monosomy X

b)

Trisomy 13

c)

Trisomy 18

d)

Trisomy 21

23.

Turner Syndrome is also known as _______.

a)

Monosomy X

b)

Trisomy 13

c)

Trisomy 18

d)

Trisomy 21

24.

set of information that controls a trait


a segment of DNA on a chromosome that codes for a specific trait

a)

gene

b)

trait

c)

genetics

d)

clone

25.

different forms of genes

a)

allele

b)

trait

c)

heredity

d)

genetics

26.

allele whose trait always shows up in the organism when the allele is present

a)

dominant allele

b)

recessive allele

c)

homozygous

d)

heterozygous

27.

allele that is masked when a dominant allele is present

a)

recessive allele

b)

dominant allele

c)

homozygous

d)

heterozygous

28.

an organisms genetic makeup or allele combination

a)

genotype

b)

phenotype

c)

dominant allele

d)

recessive allele

29.

an organisms physical appearance or visible traits

a)

genotype

b)

phenotype

c)

dominant allele

d)

recessive allele

30.

all of the DNA in one cell of an organism

a)

genome

b)

genetics

c)

trait

d)

gene

31.
An individual's sex is determined by 
a)
1 of 23 chromosomes
b)
2 of 46 chromosomes
c)
4 of 92 chromosomes
32.
The sex of a child is determined by
a)
whether the father's sperm contains an x or y chromosome
b)
whether the mother's egg contains an x or y chromosome
c)
the age of the parents
33.
Why is the gene for a disease or disorder more likely to be found on the X chromosome than Y?
a)
The X chromosome has many more genes
b)
The Y chromosome has many more genes
34.
Males are more likely to suffer from a sex-linked disease or disorder because
a)
males are the weaker sex
b)
males have less DNA
c)
males have 1 X chromosome, so the disorder is more likely to be expressed
35.
When we say that a woman is a carrier for a genetic disease or disorder it means that
a)
she has 1 gene, but not the disorder
b)
she has 2 genes for the disorder
c)
she can pass the gene only to male children
d)
she can pass the gene only to female children
36.
Why are men 16 times more likely to be color-blind than women?
a)
to be color-blind, you must have a Y chromosome
b)
to be color-blind, all of your X chromosomes must have the gene
c)
color-blindness is caused by testosterone
d)
color-blindness is caused by the same gene as baldness
37.
If a gene is found only on the X chromosome and not the Y chromosome, it is said to be 
a)
sex-linked trait
b)
polygenic trait
c)
codominant trait
d)
incomplete dominance trait
38.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a female who is a carrier for hemophilia?
a)
XHXh
b)
XhXh
c)
XHXH
d)
XhY
39.
Hemophilia is a recessive x-linked disorder.
Which genotype represents a male with hemophilia?
a)
XHXh
b)
XhXh
c)
XHY
d)
XhY
40.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
41.
Which individual in the first generation is a carrier?
a)
The male
b)
The female
c)
individual 1
d)
None of the above
42.
How many kids did the mother and father from the first generation have?
a)
2
b)
4
c)
5
d)
6
43.
In the second generation-how many people have the disease or display the physical trait?
a)
2
b)
4
c)
5
d)
6
44.
In the second generation-how many people are carriers of the trait?
a)
2
b)
3
c)
5
d)
6
45.
How many people in this whole pedigree have the trait/disease?
a)
2
b)
3
c)
4
d)
6
46.
How many people in the pedigree are carriers for the disorder? 
a)
6 
b)
8
c)
2
d)
9
47.
Looking at this pedigree, how many family members have the disease?
a)
4
b)
7
c)
All
d)
None
48.
What do half colored symbols represent?
a)
The individual is a carrier.
b)
The individual expresses the trait.
c)
The individual has both recessive alleles.
d)
The individual has both dominant alleles.
49.
In a pedigree, what shape represents a male?
a)
circle
b)
square
c)
triangle
d)
diamond
50.
How many people in the pedigree are carriers for the disorder? 
a)
6 
b)
8
c)
2
d)
9
51.
Examine the pedigree. The allele for the presence of a widow’s peak is dominant. Therefore, we can tell from the chart that in the couple labeled 2:
a)
the male is heterozygous and the female is homozygous.
b)
the male is homozygous and the female is heterozygous.
c)
the male is homozygous and the female is homozygous.
d)
the male is heterozygous and the female is heterozygous.
52.
What do half colored symbols represent?
a)
The individual is a carrier.
b)
The individual expresses the trait.
c)
The individual has both recessive alleles.
d)
The individual has both dominant alleles.
53.
a)
Not affected Female
b)
Not affected Male
c)
Affected Male
d)
Affected Female
54.
a)
Not Affected Male
b)
Not Affected Female
c)
Affected Male
d)
Affected Female
55.

Which of the following statements is incorrect about haemophilia?

a)

Haemophilia exist in three forms- A,B and C

b)

Hemophilia A is the most common type of hemophilia, and it’s caused by a deficiency in factor VIII

c)

Genes for haemophilia are located on the X chromosome, making hemophilia an X-linked recessive disease

d)

Females are more likely to be affected by the disease

56.

H= normal blood clotting

h=hemophilia


XHXh x XHY


What is the probability that any of their offspring will have hemophilia?

a)

4/4

b)

3/4

c)

2/4

d)

1/4

57.

Look at this cross: XBXb x XBY


What proportion of the male children are colorblind?

a)

100%

b)

75%

c)

50%

d)

25%

58.

In a cross between a pure red eyed female and a white eyed male, what would the genotypes of the parents be?

a)

XRXr with XR Y

b)

XRXr with Xr Y

c)

XRXR with XR Y

d)

XRXR with Xr Y

e)

XrXr with Xr Y

59.
What percentage of the female offspring will be a carrier for this recessive disease?
a)
0%
b)
50%
c)
100%
d)
25%
60.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXb
b)
XbXb
c)
XbY
d)
XBY
61.
Vitamin D resistant rickets (deformed bone formation) is a sex-linked DOMINANT trait.  According to the Punnett square, what percentage of female offspring will have the disorder?
a)
0%
b)
25%
c)
50%
d)
100%
62.
What percentage of the offspring will have this recessive disease?
a)
0%
b)
25%
c)
50%
d)
75%

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