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WorksheetsHeredity Basics
Total questions: 30
Worksheet time: 36mins
Name
Class
Date
1.
RR
a)
homozygous
b)
heterozygous
2.
OO
a)
homozygous
b)
heterozygous
3.
Pp
a)
Homozygous
b)
Heterozygous
4.
HH
a)
homozygous
b)
heterozygous
5.
Zz
a)
homozygous
b)
heterozygous
6.
Jj
a)
homozygous
b)
heterozygous
7.
Bb
a)
homozygous
b)
heterozygous
8.
DD
a)
homozygous
b)
heterozygous
9.
Yellow is dominant to white. What is the phenotype of this organism?
Yy
Yy
a)
Yellow
b)
white
10.
Yellow is dominant to white, what is the phenotype of this organism?
YY
YY
a)
Yellow
b)
white
11.
Yellow is dominant to white. What is the phenotype of this organism?
yy
yy
a)
Yellow
b)
white
12.
Tall is dominant to short. What is the phenotype of this organism?
Tt
Tt
a)
tall
b)
short
13.
What is genetics?
a)
The study of DNA nucleotides
b)
The study of heredity
c)
The study of a cell dividing into 2
d)
The study of eye color
14.
What is heredity?
a)
How different genes and traits are passed down from parents to children
b)
How different genes and traits are passed down from children to parents
c)
How traits are identical to parents
d)
How traits are different between siblings
15.
What is a gene?
a)
An entire chromosome that codes for a trait
b)
a piece of clothing
c)
a piece of a DNA on chromosome that codes for a trait
d)
Chemical messengers in your brain that code for a trait
16.
What is a genotype?
a)
The genetic make up (code)
b)
The physical trait
17.
What is a phenotype
a)
The genetic make up (code)
b)
The physical trait
18.
What is a dominant allele?
a)
A trait that is always shown (capital letter)
b)
A trait that can be hidden (lower case letter)
c)
Alleles that are the same
d)
Alleles that are different
19.
What is a recessive allele?
a)
A trait that is always shown (capital letter)
b)
A trait that can be hidden (lower case letter)
c)
Alleles that are the same
d)
Alleles that are different
20.
Dominant or recessive?
tt
tt
a)
Dominant
b)
Recessive
21.
Which of the following pairs is homozygous dominant?
a)
Hh
b)
pp
c)
HH
d)
aa
22.
Jackie is homozygous recessive for having dimples (D). What is her genotype?
a)
pp
b)
Dd
c)
dd
d)
DD
23.
Which of the following is a phenotype?
a)
BB
b)
Bb
c)
bb
d)
Blue eyes
24.
True or false?
Heterozygous recessive traits have two identical allels expressed as lowercase
Heterozygous recessive traits have two identical allels expressed as lowercase
a)
True
b)
False
25.
Dominant or recessive?
Dd
Dd
a)
Dominant
b)
recessive
c)
neither
d)
homozygous
26.
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
a)
Incomplete Dominance
b)
Co dominance
c)
Independent assortment
d)
Recessive inheritance
27.
This type of inheritance pattern is a MIXTURE of both traits.
a)
incomplete dominance
b)
co-dominance
c)
complete dominance
d)
recessive pattern
28.
This type of inheritance pattern shows BOTH traits in possible offspring
a)
complete dominance
b)
incomplete dominance
c)
co-dominance
d)
dominant pattern
29.
Snap dragon color is a incomplete dominant trait. A red flower (R1R1) is crossed with white flower (R2R2)? What color are flowers that are R1R2?
a)
Red
b)
Red and White
c)
White
d)
Pink
30.
In chickens, feather color is codominant. If a black chicken BB is mated with one that is black and white (BW) what are the chances of having a chicken that is black and white?
a)
50%
b)
0%
c)
25%
d)
100%
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