WorksheetsSA Biology
Total questions: 25
Worksheet time: 2hrs 39mins
Name
Class
Date
1.
Complex molecule that carries genetic information that defines an organism's traits. It is stored in the nucleus.
a)
DNA
b)
protein
c)
RNA
d)
glucose nucleic acid (GNA)
2.
How many alleles (letters) do each person carry for a trait?
a)
1
b)
2
c)
3
d)
4
3.
Dominant alleles are represented by a:
a)
Male gene
b)
lowercase letter
c)
recessive trait
d)
capital letter
4.
Aa, DD, bB, yy are all examples of
a)
genotypes
b)
phenotypes
5.
In a heterozygous genotype, the ___________ allele takes over in the phenotype.
a)
recessive
b)
dominant
c)
lower case letter
d)
both
6.
What you see, or the physical appearance.
a)
Genotype
b)
Phenotype
c)
Homozygous
d)
Heterozygous
7.
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
8.
B = brown eyes
b = blue eyes
What is true about these two brothers that have brown eyes?
One has genotype BB the other Bb.
b = blue eyes
What is true about these two brothers that have brown eyes?
One has genotype BB the other Bb.
a)
they have same phenotype and genotype
b)
they have different genotypes and phenotypes
c)
they have same phenotype but different genotypes
d)
they have same genotype but different phenotypes
9.
AA and Aa always show up as
a)
dominant
b)
recessive
10.
aa always shows up as
a)
dominant
b)
recessive
11.
Aa is
a)
homozygous
b)
heterozygous
12.
Which of the following is a phenotype?
a)
Aa
b)
red hair
c)
heterozygous
d)
DNA
13.
Which of the following genotypes is homozygous dominant?
a)
A
b)
Aa
c)
AA
d)
aa
14.
Which of the following genotypes is heterozygous?
a)
Bb
b)
BB
c)
bb
d)
B
15.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
16.
Which of the following is homozygous dominant?
a)
Yy
b)
Y
c)
yy
d)
YY
17.
Which of the following is homozygous recessive?
a)
Tt
b)
tt
c)
TT
d)
T
18.
In a flowering plant species, red flower color (R) is dominant over white flower color (r). What is the genotype of any red-flowering plant resulting from this species?
a)
rr
b)
R
c)
RR
d)
RR or Rr
19.
Which of the characteristics is a lion least likely to pass on to its offspring?
a)
fur color
b)
length of tail
c)
scars on leg
d)
body size
20.
What gender has an X and a Y chromosome?
a)
male
b)
female
c)
transgender
d)
all of the above
21.
W=white hair
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
w= non-white hair
If you cross a horse with WW and a horse with ww what fraction of the offspring would be expected to have white hair?
a)
none
b)
3/4
c)
1/2
d)
all
22.
Nutrients are:
a)
substances that raw materials and energy.
b)
empty calories
c)
amino acids
d)
in water
23.
______________ are a major source of energy and can come from bread, pasta, potato, and rice
a)
proteins
b)
carbohydrates
c)
calories
d)
cholesterol
24.
Your body needs ________ for growth and repair
a)
carbohydrates
b)
protein
c)
calories
d)
glucose
25.
___________ is a major source of energy that you body converts from sugar
a)
protein
b)
glucose
c)
nutrients
d)
bread
100 %
