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WorksheetsHeredity
Total questions: 25
Worksheet time: 2hrs 52mins
Name
Class
Date
1.
Heredity is the passing of traits from _____________________ to _____________________
a)
predators to prey
b)
water to rain
c)
parents to offspring
d)
fungi to protists
2.
___________________________ is the study of how traits are passed on, or inherited.
a)
dominant traits
b)
ratio
c)
phenotype
d)
genetics
3.
Why did Mendel choose to study pea plants in order to learn how traits are passed from parent to offspring?
a)
Pea plants grow quickly
b)
Pea plants are ultraviolet
c)
Pea plants are rare and expensive
d)
Pea plants are take years to grow
4.
One trait that is ALWAYS present and causes the other traits to disappear is a ________________________
a)
recessive trait
b)
aggressive trait
c)
absent trait
d)
dominant trait
5.
True or False: Recessive traits are ALWAYS present
a)
True
b)
False
6.
A ___________________ is a relationship between two numbers
a)
genetic
b)
trait
c)
ratio
d)
cycle
7.
The different forms of a gene
a)
heredity
b)
genetics
c)
gene
d)
alleles
8.
Offspring receive the same amount of hereditary information from each parent.
a)
true
b)
false
9.
What allele combination should go in the missing box?
a)
AA
b)
Aa
c)
aa
d)
none of these
10.
Which of the following alleles is homozygous (purebred) recessive?
a)
Tt
b)
tt
c)
TT
d)
t
11.
Aa is
a)
homozygous (purebred)
b)
heterozygous (hybrid)
12.
G = green, g = yellow
The genotype for a yellow plant is...
The genotype for a yellow plant is...
a)
GG
b)
Gg
c)
gg
d)
all of the choices result in yellow
13.
T - tall and t = short
In the punnett square below, what belongs in the missing square
In the punnett square below, what belongs in the missing square
a)
tt
b)
Tt
c)
Bb
d)
TT
14.
When two identical alleles for a trait are in an organism, the organism is said to be ____________?
a)
Heterozygous
b)
Homozygous
c)
allele
d)
resseive
15.
characteristic that is inherited; can be either dominant or recessive
a)
genes
b)
allele
c)
chromosome
d)
trait
16.
outward appearance of an organism, regardless of its genes.
a)
phenotype
b)
genotype
c)
haploid
d)
deploid
17.
The genetic characteristics of recessive genes
a)
tend to mask the characteristics of dominant genes.
b)
are always expressed in the phenotype.
c)
are usually codominant.
d)
tend to be masked by the characteristics of dominant genes.
18.
What are alleles that are neither dominant nor recessive?
a)
Codominance
b)
Polygenic Inheritance
c)
Purebred
d)
Multiple Alleles
19.
What is the number that describes how likely it is that an event will occur?
a)
Probability
b)
Traits
c)
Ratio
d)
Recessive
20.
What is the different forms of a gene?
a)
Alleles
b)
Punnett Square
c)
Genotype
d)
Phenotype
21.
What are these an example of: Tt, TT, tt?
a)
Genotypes
b)
Phenotypes
c)
Incomplete Dominance
d)
Codominance
22.
What occurs when one allele is only partially dominant?
a)
Incomplete Dominance
b)
Purebred
c)
Codominace
d)
Multiple Alleles
23.
What show all the possible outcomes of a genetic cross?
a)
Punnett Squares
b)
Probability
c)
Genotypes
d)
Phenotypes
24.
A homozygous dominant dog with brown fur is crossed with a heterozygous dog with brown fur. What are the percentages of the possible genotypes?
a)
100% BB
b)
75% BB and 25%Bb
c)
50 % BB and 50% Bb
d)
50% Bb and 50% bb
25.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
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