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WorksheetsChapter 11: Mendelian Genetics
Total questions: 25
Worksheet time: 25mins
Gregor Mendel used pea plants to study
flowering
gamete formation
the inheritance of traits
cross-pollination
When an organism is diploid which of the following is true?
Aa,,,,,Rr,,,,,,Bb
It has two sets of chromosomes
It has one set of chromosomes
It only reproduces asexually
It only has one type of chromosome
Which is an example of a phenotype?
Gg
hairy
homozygous
all of the above
What are the possible gametes from this parent: Aa?
AA, Aa, and aa
A and a
Aa
An example of a homozygous genotype is:
AABb
aa
AB
Aa
An example of a heterozygous genotype is:
Aa
AAbb
aa
ABCD
You cross a red (RR) snapdragon with a white (rr) and all the offspring are pink colored (Rr). This is an example of
Mendelian dominance
Partial recessiveness
Incomplete dominance
Codominance
The genetic makeup of an organism (letters, such as Bb) is called its
genotype
phenotype
allelic combo
Mary Kay
Most traits have 2 forms or alleles. When a trait has 3 or more alleles, such as human blood type or skin color, this is called:
codominance
multiple alleles
linkage
Traits that are expressed (visible) in hybrid offspring (such as Bb) are
recessive
homozygous
dominant
heterozygous
If 2 parents with the genotypes Aa are crossed, what would go on the sides of the Punnet Square?
A and A
AB
A and a
a and a
Traits that are hidden in a heterozygous genotype (such as Rr) are called:
recessive traits
dominant traits
hidden traits
heterozygous traits
Most organisms have 2 copies (alleles) of each gene. These copies are located on:
homologous chromosomes
the same chromosome
sister chromatids
Different copies or forms of a gene controlling a certain trait are called:
chromosomes
genes
alleles
In a diploid organism, alleles for a trait always occur:
as a single unit
in pairs
sometimes in pairs, sometimes by themselves
According to the laws of probability:
Actual numbers are always close to predicted numbers
There is no way to predict the outcome of an event
The larger to sample number, the closer actual numbers will be to expected numbers
You flip a coin 100 times and find that 45% of your flips come up heads. How many heads did you have?
4.5
50
45
can't tell
Observe the genetic cross below. What is the identity of the missing (?) gamete?
A
a
Aa
R
An individual possesses two identical alleles for a certain trait (such as BB). For this trait, the individual is said to be
dominant
hybrid
homozygous
heterozygous
What is the phenotype ratio (different letters) of the offspring of the cross Aa x Aa?
3:1
1:1
1:2:1
9:3:3:1
The coat of a roan horse is found to be a mixture of red hairs and white hairs. This is an example of:
recombination
codominance
multiple alleles
incomplete dominance
Look at the following Punnett Square for blood type. What are the blood types in the square?
A and B
O and AB
AB, A, B, and O
O only
The main purpose of meiosis is:
to form identical cells to the parent cells
to form cells with twice the number of chromosomes
to form gametes with ½ the number of chromosomes
Which of the following is true about cells produced in meiosis?
they are haploid
they are gametes
They are sperm or eggs
All of the above
If an organism’s haploid number is 23, its diploid number is
12
23
46
0
