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WorksheetsGenetics: The Science of Heredity - Chapter 2
Total questions: 22
Worksheet time: 11mins
What does the notation TT represent?
two dominant alleles
two recessive alleles
a hybrid
heterozygous recessive
What is the probability of producing a tall pea plant from a genetic cross between two hybrid tall pea plants?
1/4
2/4
3/4
4/4
What did Mendel do to study different characteristics in his genetics experiments?
he studied asexual plants only
he studied only tall and short pea plants
he cross pollinated plants
he grew roses that were pink
An organism's genotype is its
genetic makeup
physical appearance
feather color
eye color
Physical characteristics studied in genetics are known as:
traits
offspring
generations
hybrids
What is the chromosome theory of inheritance?
chromosomes are carried from parent to offspring on hybrids
genes are carried from parents to offspring on chromosomes
hybrid pairs of chromosomes combine to form offspring
codominant genes combine to form new allele based heterozygous offspring
What does a Punnett square show?
all the possible outcomes of a genetic cross
only the dominant alleles
only the recessive alleles
all of Mendel's 30,000 crosses
A ___________________ organism is the offspring of many generations of organisms that have the same trait.
dominant
probability
purebred
If a ______________________ allele is present , its trait will appear in the organism.
dominant
purebred
probability
Mendel used the principles of __________ to predict what percent of offspring would show a particular trait.
purebred
hybrid
dominant
probability
A hybrid is the offspring of parents that have ___________ alleles for a trait.
the same
different
two
four
Tt would represent a heterozygous pea plant.
true
false
In Mendel's famous test cross between two purebred pea plants, one tall and one short, all offspring were __________.
short
recessive purebred
tall
medium
An organisms phenotype is its allele combinations.
true
false
Sex cells produced by meiosis have ____________ the number of chromosomes as the parent cells.
twice
half
thrice
100%
If a cross between white flowers (W) and purple flowers (w), which color flower is dominant?
dominant
white
recessive
purple
In a cross between flowers where white is dominant and purple is recessive, which allele combination represents a purple flower?
WW
Ww
Pp
ww
Purebred is the same meaning as _______________.
heterozygous
homozygous
hybrid
Hybrid has the same meaning as _______________.
heterozygous
homozygous
purebred
1/4 is equal to _________.
0%
25%
50%
75%
75% is equal to _________.
1/4
2/4
3/4
4/4
Mendel ______________ pea plants to study traits.
cut
naturally pollinated
crossed
