WorksheetsHuman Inheritance
Total questions: 25
Worksheet time: 12mins
Name
Class
Date
1.
How many chromosomes are there in most of your body's cells?
a)
23
b)
46
c)
12
d)
48
2.
How many chromosomes are in sex cells of humans?
a)
12
b)
46
c)
23
d)
18
3.
______________________ are three or more forms of a gene that code for a single trait.
a)
Gametes
b)
Chromosomes
c)
Multiple Alleles
d)
Genes
4.
An example of a trait controlled by many genes is
a)
eye color
b)
widow's peak
c)
hair on knuckles
d)
tongue roller
5.
A ______________ is a person who has one normal or dominant allele for a trait and a recessive or abnormal allele for a trait.
a)
codominant
b)
disorder
c)
carrier
d)
pedigree
6.
One ___________ is usually dominant, while the other is recessive.
a)
gene
b)
clone
c)
disorder
d)
allele
7.
Besides genetics, what can alter or change a gene? (HINT: Height is an example.)
a)
cancer
b)
environment
c)
doctors
d)
television
8.
What is the genotype for a male?
a)
Tt
b)
GG
c)
XX
d)
XY
9.
What is the genotype for an egg cell
a)
Tt
b)
GG
c)
XX
d)
XY
10.
What disease is a genetic disorder that results in abnormally shaped blood cells?
a)
Sickle Cell
b)
Hemophilia
c)
Cystic Fibrosis
d)
Down Syndrome
11.
What can affect a person's height?
a)
Genetics
b)
Environmental factors
c)
Parents
d)
Genetics and environmental factors
12.
If a trait, like colorblindness, is a sex-linked trait, who is more likely to get the disorder?
a)
Females
b)
Males
c)
Females and males equally
d)
No one is likely to get the disorder
13.
What is a form of selective breeding that crosses genetically different individuals in an attempt to keep the best traits of both?
a)
Inbreeding
b)
Cloning
c)
Replication
d)
Hybridiztion
14.
What form of selective breeding crosses parents with the same or similar sets of alleles?
a)
Inbreeding
b)
Replication
c)
Hybridization
d)
Cloning
15.
When many genes control a trait, the trait will show a LARGE amount of what?
a)
Genotypes
b)
Phenotypes
c)
Genetic Crosses
d)
Chromosomes
16.
What genetic disorder causes the body to produce unusually thick mucus in the lungs and intestines?
a)
Cystic Fibrosis
b)
Sickle Cell
c)
Down Syndrome
d)
Hemophilia
17.
Sex-linked genes are mostly found on which chromosome?
a)
XX
b)
XY
c)
Y only
d)
X only
18.
Cloning results in two organisms that are
a)
genetically different
b)
genetically identical
c)
does not result in any organism
d)
genetically similar, but not identical
19.
What is commonly used to track the occurance of a particular trait in a family?
a)
Punnett squares
b)
Karyotypes
c)
Family trees
d)
Pedigrees
20.
A person that has hemophilia
a)
will die
b)
bleeds easily
c)
has too much mucus built up in their bodies
d)
is colorblind
21.
What disorder occurs when chromosomes fail to separate properly during meiosis?
a)
Sickle Cell
b)
Cystic Fibrosis
c)
Hemophilia
d)
Down Syndrome
22.
A recessive allele on the X chromosome will always produce the trait in a male.
a)
True
b)
False
23.
Except for identical twins, all people have different DNA.
a)
True
b)
False
24.
What symbol do geneticists use to represent a male on a pedigree?
a)
Circle
b)
Square
c)
Star
d)
Triangle
25.
______________ is controlled by one gene with many alleles.
a)
Widow's peak
b)
Tongue roller
c)
Attached earlobes
d)
Blood type
100 %
