WorksheetsUnit 6 - Heredity Test Review
Total questions: 25
Worksheet time: 28mins
Which of the following represents an example of a phenotype?
black feathers
BB
bb
Bb
Which of the following is an example of a genotype?
Bb
green pea pods
yellow flowers
speckled feathers
The different forms of a gene are called ______.
traits
pollinations
alleles
hybrids
A phenotype that results from a dominant trait must have at least ____ dominant allele(s) present in the parent(s) genotype.
1
2
3
4
Organisms that have two identical alleles for a particular trait are called _____.
hybrid
homozygous
heterozygous
dominant
Organisms that have two different alleles for a particular trait are called _____.
hybrid
homozygous
heterozygous
dominant
A man heterozygous for blood type A marries a woman heterozygous for blood type B. The chance that their first child will have type O blood is _____.
0%
25%
50%
75%
A breed of koi fish shows codominance for scale color. One allele codes for orange scales, another codes for white scales. The scales of heterozygous individuals will be ____.
yellow
orange
white
orange & white
If a guinea pig's alleles for fur length are ss, what must be true of its parents?
Both parents have long hair.
Both parents had average hair length.
Both parents contributed a recessive allele.
Both parents contributed a dominant allele.
If a pea plant has a recessive allele (y) for green peas, it will produce:
green peas if it also has a dominant allele (Y) for yellow peas.
both green and yellow peas if it also has a dominant allele (Y) for yellow peas.
green peas if it does not also have a dominant allele (Y) for yellow peas.
yellow peas if it does not also have a dominant allele (Y) for green peas.
The Principle of Independent Assortment states:
genes for different traits separate without influencing other traits' inheritance
alleles for traits separate during meiosis
all traits influence other traits during gamete formation
Gregor Mendel was a boss.
White-flowered snapdragons crossed with red-flowered snapdragons to produce pink-flowered offspring is an example of ______.
codominance
complete dominance
recessive alleles
incomplete dominance
Joshua has type AB blood. His father has type A blood and his mother has type B blood. What is Joshua's phenotype an example of?
homozygous recessive heredity
Mendel's dominant & recessive heredity
incomplete dominance
codominance
In cats, there are 4 different alleles (versions of the gene) for coat color. What pattern of inheritance is this an example of?
incomplete dominance
codominance
polygenic inheritance
multiple alleles
Eye color in fruit flies is an sex-linked trait because the trait is found on the X chromosome. Which individuals more commonly express recessive sex-linked traits?
Males, because they have 2 X chromosomes
Females, because they have only 1 X chromosome
Offspring who later outgrow their inherited eye color traits
Males, because they have only 1 X chromosome
The diagram shows a diploid cell with two pairs of homologous chromosomes. Due to independent assortment, what is the possible genetic combinations produced when gametes are formed?
A, B, a, b
Aa, Bb
AaBb
AB, Ab, aB, ab
Variation in human skin color & individual height are examples of:
incomplete dominance
codominance
polygenic traits
multiple alleles
Polygenic inheritance is:
a trait that is influenced by more than 1 gene
a gene that has 3 or more alleles
1 gene that influences many traits
Multiple allele inheritance is:
a trait that is influenced by more than 1 gene
a gene that has 3 or more alleles
1 gene that influences many traits
Pleiotropy is:
a trait that is influenced by more than 1 gene
a gene that has 3 or more alleles
1 gene that influences many traits
During warm summers, artic fox fur is reddish-brown. In cold winters, arctic fox fur turns white. Why does this occur?
The fox's DNA changes every winter
Mutations in DNA due to extreme temperatures
Random alteration of DNA can occur in fox fur chromosomes
Phenotypic expression of the fox fur color gene is affected by temperature
Which of the following supports the claim that the environment can affect phenotypic expression of genetic traits?
Oak trees get taller as they age.
Hydrangea flower color varies with changes in soil pH.
Dandelion plants self-pollinate.
Pinion trees bear cones every other year (biennial).
The law of segregation states:
Gregor Mendel was a Catholic monk.
Alleles separate during gamete formation in meiosis.
Genes for different traits separate independently of one another
Every trait in your karyotype affects every other trait.
Alleles for A and B blood cells are codominant. The condition where no antigens are present on the blood cell is known as Type O blood, which is a recessive trait. Which set of parents can most likely produce a child with Type O blood?
Father with type AB blood and mother with homozygous A blood
(AB x OO)
Father with type AB blood and mother with type O blood
(AB x OO)
Father with heterozygous type A blood and mother with type O blood
(AO x OO)
Father with homozygous type A blood and mother with homozygous type B blood
(AA x BB)
In pea plants, the trait for tall stems (T) is dominant over the trait for short stems (t). If two heterozygous (Tt) tall plants are crossed, what percentage of the offspring will be tall?
100%
75%
50%
25%
