Genetics
Lapbook
Basic Lapbook Base
Creating a Lapbook Base
1. Open a file folder and lay it flat.
2. Fold both right and left edges toward the center so they
meet and close like a pair of shutters.
3. Crease firmly.
Books with Flaps
Fold Instructions:
1. Each Flap Book will need to be cut on the dotted lines and
then folded to create flaps.
Pockets & Pocket Books
Fold Instructions:
Each template will have its own instructions.
Law
of
Segre
gatio
n
Law
of
Indep
endent
Assortm
Law
of
Domin
ance
Monohybrid Problem 1
Monohybrid Problem 2
Monohybrid Problem 3
In pea plants, round seeds are
dominant to wrinkled seeds. If a
heterozygous pea plant is crossed with
a plant that is homozygous recessive for
seed shape, what is the probability that
the offspring will have wrinkled seeds?
In humans, tongue rolling (T) is a
dominant trait, those with the recessive
condition cannot roll their tongues (t).
In a cross of a homozygous tongueroller dog with a non-tongue roller,
what will be the phenotype of the F1
generation?
Woodrats are medium sized rodents with lots
of interesting behaviors. You may know of
them as packrats. Let's assume that the trait
of bringing home shiny objects (H) is
controlled by a single locus gene and is
dominant to the trait of carrying home only
dull objects (h). Suppose two heterozygous
individuals are crossed. What will be the ratio
of genotypes in the F1 generation?
Monohybrid Problem 4
Monohybrid Problem 5
Monohybrid Problem 6
The common grackle is a species of robinsized blackbirds that are fairly common
over most of the United States. Suppose
that long tails (L) were dominant to short
tails (l) in these birds. What would be the
proportion of phenotypes in the offspring,
if a heterozygous long-tailed male was
crossed with a homozygous short-tailed
female?
Two spotted dogs were bred with each
other and they had a litter of 11
puppies in which 8 were spotted and
three were solid white. What were the
genotypes of the parents? Show a
Punnett Square to support your answer.
In goats, a recessive gene causes the
goats to "faint" when they are startled.
A farmer breeds two goats (that have
never fainted) and their first offspring
faints two days after its birth. What
must the parent's genotypes have
been? Show the cross to prove it.
Dihybrid Problem 1
Dihybrid Problem 2
Dihybrid Problem 3
In pea plants, yellow seed color is
dominant to green seed color and
round seeds are dominant to wrinkled
seeds. If a pea plant that is
heterozygous round and yellow seeds is
crossed with a plant that has wrinkled,
green seeds, what is the probability
that the offspring will have green
seeds?
In rabbits, grey hair is dominant to
white hair. Also in rabbits, black eyes
are dominant to red eyes. A male rabbit
with the genotype GGbb is crossed with
a female rabbit with the genotype ggBb.
Determine the proportions of
phenotypes that can be expected in the
offspring.
About 70% of Americans perceive a bitter
taste from the chemical
phenylthiocarbamide (PTC). The ability to
taste this chemical results from a
dominant allele (T) and not being able to
taste PTC is the result of having two
recessive alleles (t). Normal skin
pigmentation in humans is dominant (A)
while the lack of pigment results in
albanism (a). A albino woman that is a
heterozygous taster marries and has
children with a man who is a non-taster
who is heterozygous for normal skin
pigmentation. What percentage of their
offspring will look like their mother?
Dihybrid Problem 4
Dihybrid Problem 5
Carrion beetles lay their eggs in dead
animals and then bury them in the
ground until they hatch. Assume that
the preference for fresh meat (F) is
dominant to the preference for rotted
meat (f) and that the tendency to bury
the meat shallow (M) is dominant to
the tendency to bury the meat deep
(m). Suppose a female carrion beetle
homozygous dominant for both traits
mates with a male homozygous
recessive for both traits. What will be
the genotype of the F1 generation?
Female Anole lizards prefer to mate with
lizards who bob their heads fast (F) and
have red throat patches (R). These alleles
are dominant to slow bobbing (f) and
yellow throats (f). A male lizard
heterozygous for head bobbing and
homozygous dominant for the red throat
patch mates with a female that is also
heterozygous for head bobbing but is
homozygous recessive for yellow throat
patches. How many of the F1 offspring
have the preferred fast bobbing / red
throat phenotype (assume 16 young)?
Problem 6
Suppose in a strain of soybeans, high oil
(H) content in the seeds is dominant to
low oil content (h) and four seeds (F) in
a pod is dominant to two seeds (f) in a
pod. A farmer crosses two soybean
plants, both heterozygous for high oil
content and four seeds per pod. What is
the phenotypic ratio of the offspring?
Sex-linked Problem 1
Sex-linked Problem 2
Sex-linked Problem 3
Colorblindness is inherited as a sexlinked recessive disease determined by
a gene found on the X chromosome
(Xb). An affected male marries a
heterozygous female. What is the
chance that they will have an affected
child? Could any of their daughters be
affected?
A man and his wife both have normal
color vision, but a daughter has redgreen color blindness (XrXr), a sex-linked
recessive trait. The man sues his wife
for divorce on grounds of infidelity. Can
genetics prove evidence supporting his
case?
Male pattern baldness is an X-linked
recessive trait (Xb). Neither Rick or
Susan are bald, but Susan’s mother
was. What are the chances that Rick
and Susan will have a bald child?
Sex-linked Problem 4
Sex-linked Problem 5
Sex-linked Problem 6
In humans, the gene for normal blood clotting
(XH) is dominant to the gene for hemophilia
(Xh). This is a sex-linked trait found on the X
chromosome. A carrier woman with normal
blood clotting marries a man who is also a
carrier with normal blood clotting. Is there any
chance that their children will have
hemophilia? If so, what are the chances?
Hairy ears is inherited as a Y-linked trait
(Yh). A man with hairy ears marries a
woman with normal ears. Draw a
Punnett square of the possible
offspring. Could any of their children
have hairy ears?
In fruit flies, eye color is an X-linked
trait. The red eye color is dominant to
the white eye color. If a heterozygous
red-eyed female is crossed with a white
eyed male, what are the chances that
their offspring will have white eyes?
What are the chances that the FEMALE
offspring will have white eyes?
Fan Books
Fold Instructions:
1. Neatly stack the fan blades and fasten with a brad where
indicated.
Genotype
Gene
Phenotype
Allele
Dominant
Heterozygous
(Hybrid)
Recessive
Dihybrid
Homozygous
Proportion
(Purebred)
Monohybrid
Ratio
Sex-linked
Incomplete
dominance
Co-dominance
Multiple alleles
F1 generation
Punnett
Square
Match the genotypes with
their phenotypes.
Match the genotypes with
their phenotypes.
Use this information to match the
genotypes with their correct
phenotypes. Shuffle and play again to
quiz yourself.
Round seeds (R) are dominant to
wrinkled seeds (r).
Tall pea plants (T) are dominant
to short pea plants (t).
Use this information to match the
genotypes with their correct
phenotypes. Shuffle and play again to
quiz yourself.
Round seeds (R) are dominant to
wrinkled seeds (r).
Tall pea plants (T) are dominant
to short pea plants (t).
Use this information to match the
genotypes with their correct
phenotypes. Shuffle and play again to
quiz yourself.
Round seeds (R) are dominant to
wrinkled seeds (r).
Tall pea plants (T) are dominant
to short pea plants (t).
Use this information to match the
genotypes with their correct
phenotypes. Shuffle and play again to
quiz yourself.
Round seeds (R) are dominant to
wrinkled seeds (r).
Tall pea plants (T) are dominant
to short pea plants (t).
Use this information to match the
genotypes with their correct
phenotypes. Shuffle and play again to
quiz yourself.
Round seeds (R) are dominant to
wrinkled seeds (r).
Tall pea plants (T) are dominant
to short pea plants (t).
Use this information to match the
genotypes with their correct
phenotypes. Shuffle and play again to
quiz yourself.
Round seeds (R) are dominant to
wrinkled seeds (r).
Tall pea plants (T) are dominant
to short pea plants (t).
Rrtt
rrtt
rrTt
RRTT
Rr
RR
RrTt
RRTt
rr
TT
RRtt
rrTT
Tt
tt
RrTT
Homozygous
round and
short pea
plant
Wrinkled
seeds
A wrinkled
short pea
plant
Homozygous
tall
Purebred
round seed
Plant that has
wrinkled seeds
and is
heterozygous
tall
short plant that
is heterozygous
for round seeds
Purebred
round and
heterozygous
tall
Homozygous
round and tall
Short pea
plant
Heterozygous
round
Purebred
wrinkled and
tall pea plant
Hybrid tall
plant
Heterozygous
round and
homozygous
tall
Heterozygous
for both traits