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Yr 10 - Genetics Revision

Total questions: 60

Worksheet time: 1hrs 26mins

Name
Class
Date
1.
How many affected females are present? 
a)
1
b)
2
c)
3
d)
4
2.
What is the symbol for an Affected Male? 
a)
Half Circle 
b)
Half Square 
c)
Full Shaded Circle 
d)
Full Shaded Square 
3.
How many offsprings did generation 2 have? 
a)
5
b)
8
c)
9
d)
10
4.
How many carrier males are present? 
a)
2
b)
4
c)
6
d)
8
5.
How many generations are shown in this pedigree?
a)
1
b)
2
c)
3
d)
4
6.
Hemophilia is a recessive sex-linked trait. If H = normal & h = has hemophilia, which genotype represents a male with hemophilia. 
a)
XHY
b)
XHXh
c)
XhXh
d)
XhY 
7.

Cystic fibrosis is an autosomal recessive disease .


Study the pedigree what are the possible genotypes of #10? (more than one answer)

a)

AA

b)

Aa

c)

aa

d)

XAXa

8.

Cystic fibrosis is an autosomal recessive disease .


Study the pedigree what is the genotype of #9?

a)

AA

b)

Aa

c)

aa

d)

XaXa

9.

Hemophilia is a recessive sex-linked disorder located on the X chromosome .


Study the pedigree. Which two genotype #'s are INCORRECT?

a)

#7 & #9

b)

#7 & #11

c)

#2 & #9

d)

#10 & #9

10.

Fragile-X syndrome is a recessive sex-linked disorder located on the X chromosome.


Study the pedigree. What is the Genotype of #3?

a)

XHXh

b)

XhXh

c)

XHXH

d)

XHY

11.

In Mice a single gene (B or B) determines tail length the Short Tail allele is sex linked and Dominant.


Individual 6 is a Female. What is her genotype?

a)

XBXb

b)

XBXB

c)

XbXb

d)

XbY

12.
A red flowered plant (RR) is crossed with a white flowered plant (WW). The gene for petal color in these plants expresses incomplete dominance.  What percentage of the offspring will have pink (RW) flowers?
a)
0%
b)
25%
c)
50%
d)
100%
13.
This is an example of ___________?
a)
Incomplete dominance
b)
Co-Dominance
14.
What type of inheritance do two alleles have if their traits blend together? 
a)
Incomplete Dominance
b)
Co-Dominance
15.
This is an example of ___________.
a)
 Incomplete Dominance
b)
 Codominance
16.

In cats, long hair is recessive to short hair. A true-breeding (homozygous) short haired male is mated with a long-haired heterozygous female. What will their offspring look like? You may choose more than one answer.

a)

50% long haired

b)

50% short haired

c)

100% short haired

d)

100% long haired

17.

The hair form gene shows incomplete dominance. Straight hair is dominant, curly hair recessive, and wavy hair is heterozygous. Mr. and Mrs. Anderson both have wavy hair. What are the phenotypic possibilities for their children? You may chose more than one answer.

a)

25% curly

b)

100% wavy

c)

25% straight

d)

50% wavy

18.
In some carnations, flower color exhibits codominance. When crosses, Red (R) and white (W) flowers make speckled flowers (RW) that show both colors.
Complete a cross between A speckled flower and a red flower. Find the phenotype ratio.
a)
2 red: 2 speckled: 0 white
b)
4 red: 0 speckled: 0 white
c)
0 red: 4 speckled: 0 white
d)
0 red: 2 speckled: 2 white
19.
Snap dragon color is a incomplete dominant trait.  A red flower (RR) is crossed with white flower (WW)? What color are flowers that are RW?
a)
Red
b)
Red and White
c)
White
d)
Pink
20.
In Andalusian fowls, black individuals (BB) and white individuals (bb) are homozygous. Heterozygous individuals are grey (Bb).  
Cross a black fowl with a white fowl. What is the phenotype ratio?
a)
4 black: 0 grey: 0 white
b)
2 black: 2 grey: 0 white
c)
0 black: 4 grey: 0 white
d)
0 black: 2 grey: 2 white
21.
What are the possible genotypes for this cross?
a)
TT = 25% Tt= 50% tt=25%
b)
all tall
c)
TT= 75% tt = 25%
d)
Tt = 100%
22.

A man that is homozygous for type A blood (IAIA) has children with a woman that is heterozygous for type B blood (IBi). What fraction of offspring will have type AB blood?

a)

1/8

b)

1/4

c)

1/2

d)

3/4

23.

A woman with type AB blood marries a man with type O blood and they have several children. What fraction of offspring will have type A blood?

a)

1/4

b)

2/4

c)

1/2

d)

3/4

24.
What is one of the advantages, of reproducing sexually versus asexually?
a)
survival of the fittest
b)
overproduction
c)
genetic variation
d)
cloning
25.
In meiosis, Prophase 1 is when chromosomes...
a)
cross over
b)
mutate
c)
hybridize
d)
fertilize
26.
How many chromosomes are in the new cells of meiosis?
a)
46
b)
23
27.
Which of the following cell types is formed by meiosis?
a)
muscle cells
b)
skin cells
c)
sperm cells
d)
blood cells
28.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
29.
Aa is
a)
homozygous
b)
heterozygous
30.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
31.
Duchenne muscular dystrophy is a recessive x-linked disorder.
According to the Punnett square, what percentage of male offspring will have the disorder?
a)
0%
b)
25%
c)
50%
d)
100%
32.
In fruit flies, red eye color (R) is a sex-linked trait that is dominant over white eye color (r).
According to the Punnett square, what percentage of female offspring will have red eyes?
a)
0%
b)
25%
c)
50%
d)
100%
33.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXb
b)
XbXb
c)
XBXB
d)
XbY
34.
Which of the following genotypes belongs in the red box in the Punnett square?
a)
XBXb
b)
XbXb
c)
XbY
d)
XBY
35.
Colorblindness is a recessive x-linked disorder.
Which genotype represents a female who is colorblind?
a)
XNXn
b)
XnXn
c)
XNXN
d)
XnY
36.
Which process and type of resulting cells are represented?
a)
mitosis, gametes
b)
mitosis, body cells
c)
meiosis, gametes
d)
meiosis, body cells
37.
Identify the phase.
a)
Metaphase I
b)
Metaphase II
c)
Anaphase I
d)
Anaphase II
38.
Identify the process.
a)
Mitosis
b)
Meiosis I
c)
Meiosis II
d)
Interphase
39.
Which of the following is heterozygous
a)
FF
b)
tt
c)
Gg
d)
RR
40.
Which of the following is homozygous recessive?
a)
rr
b)
AA
c)
TT
d)
Ff
41.
The physical appearance of a trait is known as the-
a)
genotype
b)
phenotype
c)
characteristics
d)
intelligence
42.
Mark is heterozygous. If B is for brown hair, and b is for blonde hair, what is Mark's genotype?
a)
BB
b)
bb
c)
Bb
d)
bB
43.
How much of your DNA do you inherit from your mom?
a)
10%
b)
25%
c)
50%
d)
it varies
44.

These types of alleles are only expressed if the organism has two copies

a)

dominant

b)

recessive

c)

homozygous

d)

heterozygous

45.
Long strands of DNA are called
a)
DNA
b)
Chromosome
c)
Alleles
d)
Phenotype
46.
Any change in the sequence of DNA is...
a)
transgenic shift
b)
Single Genotype
c)
Monohybrid Trait
d)
Mutation
47.
What is a Gene?
a)
A segment of RNA that encodes for a protein
b)
A chromosome
c)
A segment of DNA that encodes for a protein
d)
Your genome
48.
Which of the following best describes a DNA molecule?
a)
double helix
b)
contains ribose
c)
made of amino acids
d)
contains Uracil
49.
What do hurtful mutations do? 
a)
Decrease chances of survival 
b)
Increases changes of survival 
c)
Decreases likelihood of developing cancer
d)
Increases likelihood of developing cancer
50.
What do helpful mutations do? 
a)
Increases chances of survival 
b)
Decreases changes of survival 
c)
Increases chances of developing cancer
d)
Decreases skills
51.

an observable characteristic

a)

trait

b)

gene

c)

allele

d)

DNA

52.

Genetic traits are determined by one or more

a)

genes

b)

chromosomes

c)

random chances

d)

cells

53.

A segment of DNA that codes for a trait

a)

gene

b)

allele

c)

chromosome

d)

chromatid

54.

The observable expression of a trait

a)

phenotype

b)

genotype

c)

chromosome

d)

allele

55.

The alleles that an organism has

a)

genotype

b)

phenotype

c)

chromosome

d)

recessive

56.

In pea plants, purple flowers (P) are dominant to white flowers (p). The phenotype of a PP plant would be

a)

purple

b)

white

c)

homozygous

d)

heterozygous

57.
When comparing the offspring of sexually and asexually reproducing organisms, we would expect the genetic material (DNA) of the sexually reproducing organism to -
a)
contain fewer mutations
b)
be lesser in quantity
c)
be simpler overall
d)
show more variation
58.
If two organisms reproduce sexually, then their offspring will exhibit a genetic makeup that is -
a)
identical to only one parent
b)
identical to all of its siblings
c)
a unique combination of traits
d)
the recessive traits of each parent
59.

Who is more likely to exhibit an X-linked recessive disorder?

a)

daughters

b)

sons

c)

sons and daughters are equally likely

d)

grandmothers

60.
In a certain species of plant, the color purple (P) is dominant to the color white (p).
According to the Punnett Square, what is the probability of an offspring being white?
a)
25%
b)
0%
c)
100%
d)
50%

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