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WorksheetsGenetics and Heredity
Total questions: 25
Worksheet time: 16mins
Name
Class
Date
1.
________________ is the study of heredity or patterns of inheritance of specific traits, relating to genes and genetic information
a)
biology
b)
genetics
c)
ecology
d)
zoology
2.
________________ is the passing of genetic factors from parent to offspring (or from one generation to the next)
a)
zoology
b)
history
c)
geology
d)
heredity
3.
The father of genetics is _____________________.
a)
Gregor Mendel
b)
Charles Darwin
c)
George Washington
d)
Robert Hooke
4.
A trait is
a)
the genetic make-up of an organism
b)
any characteristic that can be passed from parent to offspring
c)
a breeding experiment that shows the possible offspring for one specific trait
d)
the study of heredity or patterns of inheritance of specific traits, relating to genes and genetic information
5.
The law of segregation states that
a)
two alleles for each characteristic segregate during gamete production
b)
Alleles for different traits are distributed to sex cells (& offspring) independently of one another
c)
one of the factors for a pair of inherited traits will be dominant and the other recessive, unless both factors are recessive
d)
One allele is not completely dominant over another
6.
Organisms that have two identical alleles for a particular trait are said to be
a)
hybrid
b)
homozygous
c)
heterozygous
d)
dominant
7.
How many different allele combinations would be found in the gametes produced by a pea plant whose genotype was RrYY?
a)
1
b)
2
c)
4
d)
16
8.
Situations in which one allele for a gene is not completely dominant over another allele for that gene are called
a)
multiple alleles
b)
incomplete dominance
c)
co-dominance
d)
dominance
9.
A cross of a black chicken (BB) with a white chicken (WW) produces all speckled offspring (BW). This type of inheritance is known as
a)
co-dominance
b)
polygenic inheritance
c)
incomplete dominace
10.
What is the probability that a human offspring will be female?
a)
10
b)
25
c)
50
d)
100
11.
In a pedigree, a circle represents a(an)
a)
male
b)
female
c)
child
d)
adult
12.
How many chromosomes are shown in a normal human karyotype?
a)
2
b)
23
c)
46
d)
16
13.
Which of the following can be observed in a karyotype?
a)
a change in a DNA base
b)
an extra chromosome
c)
genes
d)
alleles
14.
The result in a 3rd phenotype in offspring is an example of ________________________________.
a)
incomplete dominance
b)
dominance
c)
multiple alleles
d)
heredity
15.
Complete the following dihybrid cross and determine what the phenotypic ratio is?
T = tall R = round t = short r = wrinkled
TtRr X TtRr
T = tall R = round t = short r = wrinkled
TtRr X TtRr
a)
1 tall, wrinkled : 1 short, round : 1 tall, round : 1 round, wrinkled
b)
4 tall, wrinkled : 4 short, round : 4 tall, round : 4 round, short
c)
9 tall, round : 3 tall, wrinkled : 3 short, round : 1 short, wrinkled
d)
1 tall, round : 3 tall, wrinkled : 3 short, round : 9 short, wrinkled
16.
A pedigree can be used to
a)
show how a trait is passed from one generation to the next
b)
predict the gender of new offspring
c)
create prediction of genetic crosses
d)
compare co-dominance and incomplete dominance
17.
An organism with a dominant allele for a particular form of a trait will exhibit that trait.
a)
True
b)
False
18.
Mitosis results in two cells, whereas meiosis results in one cell.
a)
True
b)
False
19.
Organisms that have two different alleles for a particular trait are said to be
a)
hybrid
b)
purebred
c)
dominant
d)
recessive
20.
In the P generation, a tall plant (Tt) is crossed with a short plant (tt). The probability that an F1 plant will be tall is
a)
25%
b)
50%
c)
75%
d)
100%
21.
What image is shown?
a)
segregation
b)
anaphase
c)
s phase
d)
crossing over
22.
Gametes have
a)
homologous chromosomes.
b)
twice the number of chromosomes found in body cells.
c)
two sets of chromosomes.
d)
half of the parent chromosomes.
23.
What principle states that during gamete formation genes for different traits separate without influencing each other’s inheritance?
a)
law of dominance
b)
law of independent assortment
c)
laws of probabilities
d)
none of the above
24.
In the pedigree, which family member is a carrier?
a)
A
b)
B
c)
E
d)
G
25.
The pedigree displays colorblindness. Which person genotype in the pedigree would be recessive for the trait?
a)
B
b)
C
c)
D
d)
G
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