WorksheetsPunnett Square TEST
Total questions: 26
Worksheet time: 13mins
One cat is Hh (heterozygous long hair) and its mate is HH (homozygous long hair). What is the probability their offspring will have the genotype Hh?
25%
50%
75%
A heterozygous red flower (Rr) is crossed with a homozygous white flower (rr). What is the probability that their offspring will have a red flower?
25%
50%
100%
A heterozygous red flower (Rr) is crossed with another heterozygous red flower (Rr). What is the probability that their offspring will have white flowers?
100%
75%
25%
If a black guinea pig (BB) is crossed with a white guinea pig (bb), what is the probability their offspring will have black fur?
25%
75%
100%
Scientists call an organism with two different alleles for a trait (Tt) a ...
heterozygous or hybrid
purebred
factor
What does TT mean to geneticists?
two dominant alleles or pure homozygous
two recessive alleles
one dominant allele and one recessive allele
What does Tt mean to geneticists?
two dominant alleles
two recessive alleles
one dominant allele and one recessive allele
What does ee mean to geneticists?
two dominant alleles
two recessive alleles
at least one dominant allele
An organism's PHYSICAL appearance is its ....
genotype
phenotype
heterozygous
An organism's genotype is its ...
genetic makeup or alleles received
feather color or how it shows up
tall stem
An organism with two identical alleles for a trait is...
tall
homozygous
heterozygous
In a plant species, purple (F) is dominant to white (f). What is the probability of an offspring being purple?
0%
100%
75%
In a plant species, purple (F) is dominant to white (f). What is the probability of an offspring being white?
25%
75%
100%
In a plant species, purple (F) is dominant to white (f). What is the probability of an offspring being PURPLE according to the Punnett Square?
75%
50%
100%
Find the genotype for a LONG, SMOOTH, WHITE, RIBBED seed. Choose the correct option.
Ll / ww / yy / Rr
Ll / ww / YY / Rr
ll / Ww / yy / rr
Stem height: Tall (T), short (t). Genotype: Tt. What is the phenotype?
Tall
Short
Medium height
Option 4
Eye Color: Brown- B, Blue- b. For genotype bb, what is the phenotype?
Brown
blue
green
purple
If D = dimples and d = no dimples, what genotype could a person with no dimples have?
DD
Dd
dd
large dimples
The gene that is always expressed is called _______________.
dominant
recesssive
weaker
punnett square
The gene expressed only when two alleles are present.
dominant
recessive
stronger
punnett square
What is the probability of getting a heterozygous offspring?
25%
50%
0%
100%
How are alleles passed on?
From the mother only
From the father only
From both parents
Randomly from the environment
The process where an organism produces genetically identical offspring is
Punnett Square
asexual reproduction
sexual reproduction
dominant allele
The process where female and male sex cells from two parents combine to produce offspring
Punnett square
recessive allele
sexual reproduction
asexual reproduction
What numbers should go below cell B (sperm cell) and cell C (body cell) to show the number of chromosomes in each?
B: 23 C: 23
B: 23 C: 46
B: 46 C: 23
If a child inherits XY chromosomes, they will be a ___.
male
female
