WorksheetsPedigrees 6.10
Total questions: 15
Worksheet time: 15mins
Name
Class
Date
1.
In a heterozygous genotype, the _____ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
both
2.
Dominant alleles are represented by a ---
a)
capital letter.
b)
lowercase letter.
3.
Aa, DD, Bb, yy are all examples of ---
a)
genotypes.
b)
phenotypes.
4.
How many alleles does a person carry for a trait?
a)
1
b)
2
c)
3
d)
4
5.
Which gender has an X and a Y chromosome?
a)
male
b)
female
6.
What is the genotype for individual I-1?
a)
aa
b)
AA
c)
Aa
7.
What is the genotype for individual II-4?
a)
aa
b)
AA
c)
Aa
8.
How many kids did the mother and father from the first generation have that was affected by the disease?
a)
2
b)
4
c)
5
d)
6
9.
What is the genotype of the great-grandfather? (Individual 2)
a)
A_
b)
aa
c)
Aa
d)
AA
10.
How many girls in this family express this recessive disorder?
a)
4
b)
5
c)
6
d)
7
11.
There are no carriers for Huntington's Disease- you either have it or you don't. Is Huntington's disease caused by a dominant or recessive trait?
a)
Dominant
b)
Recessive
12.
The genotype of the affected son and daughter at the bottom of this pedigree...
a)
could be homozygous dominant
b)
could be homozygous recessive
c)
could be heterozygous
d)
Can't tell
13.
This pedigree represents the inheritance of hemophilia in this family. How many of the females have the hemophilia trait?
a)
8
b)
5
c)
2
d)
3
14.
What you see, or the physical appearance of an organism, is called the ---
a)
genotype.
b)
phenotype.
15.
What do half colored symbols represent?
a)
The individual is a carrier (heterozygous).
b)
The individual expresses the trait.
c)
The individual has both recessive alleles.
d)
The individual has both dominant alleles.
100 %
