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WorksheetsIB Genetics 3.4
Total questions: 15
Worksheet time: 8mins
Name
Class
Date
1.
Which is the set of alleles that an individual possesses?
a)
A
gene
b)
A genotype
c)
A genome
d)
A genus
2.
What is a genetic test cross?
a)
Testing a suspected homozygote by crossing it with a known heterozygote
b)
Testing a suspected heterozygote by crossing it with a known heterozygote
c)
Testing a suspected homozygote by crossing it with a known homozygous dominant
d)
Testing a suspected heterozygote by crossing it with a known homozygous recessive
3.
What is a suspected heterozygous individual crossed with in a test cross?
a)
Homozygous dominant
b)
Homozygous Recessive
c)
Heterozygous dominant
d)
Heterozygous recessive
4.
The ABO blood grouping system has alleles of IA, IB and i. What is this an example of?
a) co-dominance
b) multiple alleles
c) sex-lingage
d) polygenic traits
a) co-dominance
b) multiple alleles
c) sex-lingage
d) polygenic traits
a)
a) only
b)
a) and b) only
c)
b) and c) only
d)
b) and d) only
5.
A parent organism of unknown genotype is mated in a test cross. Half of the offspring have the same phenotype as the parent. What can be concluded from this result?
a)
The parent of unknown genotype is heterozygous
b)
The parent of unknown genotype is homozygous dominant
c)
The parent of unknown genotype is homozygous recessive
d)
The parent of known genotype is heterozygous
6.
If an organism that is homozygous recessive for a trait is crossed with a heterozygote, what is the chance of getting a homozygous recessive phenotype in the first generation?
a)
0%
b)
25%
c)
50%
d)
100%
7.
Boys can inherit the recessive allele (c) that causes red-green color blindness from their mother, not from their father. The allele for normal red and green vision is C. Which of the following genotypes are possible in men?
a)
c only
b)
C or c only
c)
CC or cc only
d)
CC, Cc or cc only
8.
A man of blood group A and a woman of blood group B have a child. If both are heterozygous for the gene, what are the chances of them having a child with blood group B?
a)
0%
b)
25%
c)
50%
d)
75%
9.
If a man has blood group O and a woman has blood group AB, what is the probability that their child will be blood group O?
a)
0%
b)
25%
c)
50%
d)
100%
10.
A woman is a carrier for hemophilia and a man who does not have hemophilia have a child. What is the probability that the child will have hemophilia?
a)
A
b)
B
c)
C
d)
D
11.
The pedigree chart below shows the blood types of three members of a family. What could be the blood types of individuals 1 and 2?
a)
1= A 2= AB
b)
1=AB 2=A
c)
1=O 2=AB
d)
1=B 2=A
12.
The blood groups of a mother and 4 children are indicated on the pedigree chart below. What are the possible blood groups of the father?
a)
Group A only
b)
Group A or B only
c)
Group AB only
d)
Group A, B or AB only
13.
What type of inheritance is shown in this pedigree chart?
a)
X-linked dominant
b)
Y-linked dominant
c)
X-linked recessive
d)
Y-linked recessive
14.
What evidence is given in the pedigree chart below to establish that the condition is caused by a dominant allele?
a)
Two unaffected parents have unaffected children
b)
Two affected parents have affected children
c)
An affected parent and an unaffected parent have affected children
d)
Two affected parents have an unaffected child
15.
Which disease is an example of sex-linked (X-linked) inheritance?
a)
AIDS
b)
Down
syndrome
c)
Sickle-cell
anemia
d)
Hemophilia
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