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WorksheetsGenetics Basics
Total questions: 25
Worksheet time: 25mins
Which genotype is homozygous dominant?
Mm
HH
nn
rR
If red flowers is dominant in the Punnett square, what is the probability that the offspring will have red flowers?
0%
25%
50%
75%
100%
Dominant alleles are represented by which letter?
capital
lowercase
genotype
phenotype
If red flowers is dominant over white flower, what phenotype would be expressed by the genotype Rr
pink flowers
white flowers
red flowers
purple flowers
True or false? Hybrid is a synonym for heterozygous genotypes.
True
False
If red flowers are dominant to white flowers, what is the ratio of white to red flowers in the Punnett squares?
0:4
1:3
2:2
3:1
4:0
How many alleles are on each gene?
1/2
1
2
23
If brown eyes are dominant over blue eyes, what will be the phenotype of an organism that is a hybrid?
bb
BB
bB
blue eyes
brown eyes
Which of the following represents a purebred recessive genotype?
JJ
eE
Hh
rr
Which of the following are PHENOTYPES?
red hair
Gg
seven toes
SS
cc
Which of the following are GENOTYPES?
crooked pinky finger
Dd
Orange teeth
ff
Which of the following represent DOMINANT alleles?
D
Q
v
P
u
Which of the following represent recessive alleles?
R
r
T
H
y
A genotype with two dominant alleles is known as:
Homozygous dominant
homozygous recessive
heterozygous
A genotype with two different alleles is known as:
homozygous dominant
homozygous recessive
heterozygous
Which genotype is homozygous recessive?
BB
tt
Cc
Which of the following is a homozygous dominant genotype?
tt
gg
WW
Xx
In pea plants, plant height is a genetic trait. Tall (T) is dominant over dwarf (t). Which genotype would produce a dwarf plant?
TT
Tt
tt
In humans, the ability to "roll" your tongue is dominant (R) over not being able to roll your tongue (r). Which of the following genotypes would show a person who CAN roll their tongue?
rr
Rr
RR
The allele for blue eyes is recessive (b). The allele for brown eyes is dominant (B). What color eyes does someone with the genotype bb have?
blue
brown
purplish-green
Monsters with red skin have the dominant trait. Which of the following could be the genotype of this monster?
rr
red skin
Rr
RR
Fluffy feathers (F) are dominant in owls. Flat feathers (f) are recessive. This owl has the genotype Ff. What is his phenotype?
Brown eyes
fluffy feathers
flat feathers
FF
2 different alleles
homozygous dominant
homozygous
heterozygous
purebred
Different forms of a gene
alleles
dominance
recessive
Abigail has a mother who is homozygous domiant for the brown hair trait and a father who is heterozygous for brown hair and blonde hair. What would the alleles portray for Abigail's mother?
BB
Bb
bb
brown hair
