WorksheetsHackbarth Genetics Review
Total questions: 51
Worksheet time: 44mins
Gregor Mendel is known as the...
Monk President
Father of Genetics
Master of genetics
An organism’s genotype is its...
genetic makeup ( letters)
feather color
physical appearance
stem height
An organism’s physical appearance is its...
genotype
phenotype
codominance
heterozygous
The genes you receive from each parent that make up a genotype are called...
alleles
factors
masks
What does the notation TT mean to geneticists?
two dominant alleles
heterozygous alleles
one dominant and one recessive allele
What does the notation Tt mean to geneticists?
two dominant alleles
homozygous alleles
one dominant allele and one recessive allele
purebred alleles
What does a Punnett square show?
all the possible outcomes of a genetic cross
only the recessive alleles in a genetic cross
all of Mendel’s discoveries about genetic crosses
Scientists call an organism that has two different alleles ( Bb ) for a trait a...
hybrid
trait
purebred
factor
If a homozygous black guinea pig (BB) is crossed with a homozygous white guinea pig (bb), what is the probability that an offspring will have black fur?
25 percent
50 percent
75 percent
100 percent
An organism that has two identical alleles for a trait is (BB or bb) is...
tall
homozygous
heterozygous
A heterozygous organism has...
three different alleles for a trait (BbB)
two identical alleles for a trait (bb)
only one allele for a trait (b)
two different alleles for a trait (Bb)
Which combination of sex chromosomes results in a male human being?
XX
YY
XY
YY
Genetic disorders are caused by...
pedigrees
DNA mutations or changes in chromosomes
dominant alleles only
recessive alleles only
Gregor Mendel studied...
Wee Beesties
hybrid dogs
pea plants
bacteria
If a purebred dominant male (PP) and a purebred recessive female (pp) have offspring would the offspring be considered purebred? (Work out the punnett square before answering)
YES
NO
We use this to represent a dominant allele
Lower case letter
Little letter
Capital letter
Boldfaced letter
This type of trait is masked or hidden with Mendelian rules.
dominant
mutation
recessive
phenotype
TT is an example of a...
phenotype
hybrid trait
genotype
heterozygous trait
If B is a Black allele for a Chicken and b is a white allele for a chicken.
A heterozygous male crosses with a homozygous recessive female.
What is the probability of having a BB black chicken?
50%
25%
100%
0%
Male is BB (Black) and Female is WW (White) - Use Co-Dominance rules.
What is the probability of having a white chicken WW?
100%
50%
25%
0%
Male is BB (Black) and Female is WW(White) - Use Co-Dominance rules.
What is the probability of having a black and white spotted chicken?
100%
50%
25%
0%
How are Incomplete Dominance and Co Dominance rules different than normal Mendelian rules?
There is no difference
The heterozygous genotype has its own unique phenotype (pink flowers or speckled chickens)
The recessive trait is always expressed instead of the dominant trait
They use numbers instead of letters
What does a Punnett square show?
all the possible outcomes of a genetic cross
only the dominant alleles in a genetic cross
only the recessive alleles in a genetic cross
all of Mendel's discoveries about genetic crosses
An organism's physical appearance is its
genotype
phenotype
codominance
heterozygous
An organism's genotype is its
genetic makeup (letters)
feather color
A heterozygous organism has
three different alleles for a trait
two identical alleles for a trait
only one allele for a trait
two different alleles for a trait
We use this to represent a dominant allele
Lower case letter
Little letter
Capital letter
Boldfaced letter
This type of trait is masked or hidden
dominant
mutation
recessive
TT is an example of a
phenotype
hybrid trait
genotype
heterozygous trait
Which of the following is a genotype?
BB
bb
Bb
What is a phenotype?
The Physical trait
A type of plant
The genetic code
A disease
Having two of the same genes for the trait (sometimes called purebred).
heterozygous
homozygous
Having two different genes for a trait (sometimes called hybrid).
homozygous
heterozygous
genotype
protein
Which of the following alleles is homozygous recessive?
Tt
TT
tt
T
The passing of genetic traits from parent to offspring is known as
gene
trait
heredity
allele
Codominance occurs in calico cats, which allows for the Black and Tan colors to show. What percentage of the offspring represented in this P square will be calico (black and tan spotted)?
25%
50%
75%
100%
In the Punnett square shown, what must the genotype of the missing parent be?
B = brown fur b = white fur
In the Punnett square, what is the probability for white fur (Mendelian rules)?
