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WorksheetsComplete Dominance & Punnett Squares
Total questions: 30
Worksheet time: 36mins
The physical appearance of a trait is known as its (a) .
What type of dominance is shown in the picture?
Complete dominance
Incomplete dominance
Codominance
Which of the following best describes the genotype "Rr"?
recessive
heterozygous
purebred
all of the above
How would you write a homozygous dominant genotype?
AA
Aa
aa
either AA or Aa
Which of the following genotypes is dominant?
AA
Aa
aa
both AA and Aa
Which of the following genotypes are homozygous?
Aa
BB
dd
BB and dd
If tall plants are dominant and short plants are recessive, how would you write the genotype for a homozygous tall plant?
BB
Bb
bb
If black fur is dominant and white fur is recessive, what genotype would an organism with white fur have?
FF
Ff
ff
If brown eyes are dominant and blue eyes are recessive, what color eyes do the parents in this Punnett Square have?
one has brown eyes and the other has blue eyes
they both have blue eyes
they both have brown eyes
there's no way to tell based on this information
Which of these Punnett squares represents a cross between a homozygous dominant parent and a heterozygous parent?
In pea plants, being tall is dominant and being short is recessive. Two tall plants mate. One has the genotype Tt and the other has the genotype TT. What is the chance that they will have a tall offspring?
0%
25%
50%
75%
100%
If both parents have the genotype Aa, what is the chance their offspring will also have the genotype Aa?
0%
25%
50%
75%
100%
In humans, being able to curl your tongue is a dominant trait and NOT being able to curl you tongue is a recessive trait. If a mom with the genotype Rr has a child with a dad with the genotype Rr, what is the probability that their child will be able to curl its tongue?
0%
25%
50%
75%
100%
A dog with straight fur (Bb) is crossed with a dog with curly fur (bb). What is the probability the offspring will have straight fur?
0%
25%
50%
75%
100%
In rabbits, black fur is dominant and white fur is recessive. If two white rabbits mate, what is the chance that they will produce an offspring with black fur?
0%
25%
50%
75%
100%
Cody crosses a plant producing wrinkled peas with a plant producing smooth peas. Weeks later, he discovers that all the offspring plants have smooth peas. Cody drew the Punnett square above to show the genotypes of the offspring plants. What were the genotypes of the parent plants?
RR and rr
Rr and Rr
RR and Rr
Rr and rr
Cody crosses a plant producing wrinkled peas with a plant producing smooth peas. Weeks later, he discovers that all the offspring plants have smooth peas. Cody drew the Punnett square above to show the genotypes of the offspring plants. Which is the dominant phenotype in the pea plants used in Cody’s experiment?
smooth
wrinkled
RR
Rr
Gretford is heterozygous for his head shape. If (R) is for a Round head, and (r) is for an Egg head, what is Gretford's genotype?
RR
Rr
rr
rR
What is the probability of heterozygous offspring?
25%
50%
0%
100%
In plants, tall (T) is dominant to short (t).
Draw a punnett square and perform the following cross: Tt x Tt
What is the probability of producing a short plant?
0%
25%
50%
75%
What genotype would go in box 2? And is it Homozygous or Heterozygous?
BB Heterozygous
Bb Heterozygous
bb Homozygous
Bb Homozygous
Kyree is heterozygous. If (W) is for waves, and (w) if for no waves.
What is Kyree’s genotype & phenotype?
WW : waves
ww : waves
Ww : no waves
Ww : Waves
Brown eye color is dominant to blue eyes. Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?
0 %
25%
50%
75%
In the punnett square below, what belongs in the missing square
