WorksheetsGenetics Test Review
Total questions: 45
Worksheet time: 2hrs 31mins
The ability to roll the tongue is thought to be controlled by a dominant allele (R). Crossing two heterozygous (Rr) parents. What percentage will not be able to tongue-rolling trait?
Define incomplete dominance and an example.
When the letters are different
When the letters are the same
Neither allele is complete. So a blending of colors occurs
The process of two alleles both being fully expressed in the phenotype - like spots
What are all the possible gametes combinations for GGTt? (dihybrid)
GT,Gt,GT,Gt
GG, TT, tt, GG
GG, TT, Tt
According to the table, which of the following phenotypes would probably occur from ggbb?
Green, round peas
striped fur, blue eyes
Purple, smooth fur
Yellow, wrinkled peas
Who discovered the science of genetics?
Francis Crick
Give an example of a phenotype
What is the definition of a phenotype
When the letters are the same
The letter results inside of the Punnett square
the physical traits that appear from the Punnett square
When the letters are different from each other
What is the definition of a genotype
When the letters are the same
The letter results inside of the Punnett square
the physical traits that appear from the Punnett square
When the letters are different from each other
Homozygous dominant
HH
Hh
hh
GH
Homozygous recessive
HH
Hh
hh
GH
Heterozygous example
HH
Hh
hh
GH
What traits would GGLl have?
yellow feathers, short beak
Green feathers, Long beak
Green feathers, short beak
How many boxes have blue and normal wings?
9/16
4/16
16/16
6/16
How many boxes have white and normal wings?
9/16
3/16
4/16
6/16
How many boxes have white and short wings?
1/16
3/16
4/16
8/16
What is the genotype of the 3rd box across?
GGBb
GGBB
GBGB
GgBB
What would be the genotype of the 3rd box down?
AABB
AABb
aABB
AaBB
Cross a homozygous dominant brown eyes with a heterozygous brown eyes. What are the phenotypes from this cross? E dominant for brown eyes, e recessive for blue eyes.
50% brown
50% blue
100% brown eyes
100% blue eyes
50%EE 50% Ee
Define the term genetics.
Give example of genotype
Tall stem
GB
Red
PP
Dominant traits are written with a ___.
Recessive traits are written with a ___.
What does heterozygous long beak look like?
LL
Ll
ll
Gg
Using the table. What does homozygous solid gray fur look like?
BB
gg
Gg
GG
Cross two heterozygous brown mice. Brown (B) is dominant over tan (b). What are the genotypes of Punnett square?
75% Hh
25% hh
25% BB
50% Bb
25% bb
What is the phenotype of a plant with genotype Tt if
T is dominant for tall and t is recessive for short?
Short
Medium
Tall
Cannot be determined
Which of the following represents a heterozygous genotype?
AA
aa
AAA
Aa
What does a Punnett square show?
all the possible outcomes of a genetic cross
only the dominant alleles in a genetic cross
only the recessive alleles in a genetic cross
all of Mendel’s discoveries about genetic crosses
Which trait—white flowers or purple flowers—is controlled by a dominant allele?
White flowers
Purple flowers
Which trait—white flowers or purple flowers—is controlled by a recessive allele?
White flowers
Purple flowers
The dominant trait is..
Green pea seeds
Yellow pea seeds
There is no dominant seed
Jolly green giant
Define co-dominance and an example.
When the letters are different
When the letters are the same
Neither allele is complete. So a blending of colors occurs
The process of two alleles both being fully expressed in the phenotype - like spots
According to the table, which of the following phenotypes would probably occur from ggbb?
Green, round peas
striped fur, blue eyes
Purple, smooth fur
Yellow, wrinkled peas
Who discovered the science of genetics?
Francis Crick
Homozygous dominant
HH
Hh
hh
GH
Homozygous recessive
HH
Hh
hh
GH
Heterozygous example
HH
Hh
hh
GH
What traits would GGLl have?
yellow feathers, short beak
Green feathers, Long beak
Green feathers, short beak
What type of inheritance pattern is shown here?
Codominance
Incomplete dominance
A calico cat shows both the traits for orange fur and black fur. What kind of allele expression is this?
Incomplete dominance
Codominance
The green fish offspring in this image is an example of ---
Incomplete dominance
Codominance
codominance occurs in cats, which allows them to be Black, White, or Spotted as shown on this Punnett square. What percentage of the offspring will be black?
BB- black
BW- black and white
WW- white
25
50
75
100
