This is a quiz to see how much you remember about genetics! The objective of this test is to help me see what you can remember from previous genetics instruction. Please DO NOT research answers. I need to know what you currently know, not what you can google.
Your score will not count against you. You will not see if your answers are correct until after everyone has finished taking the pre-test, even after you submit. Thanks and give it your best try!
This is a quiz to see how much you remember about genetics! The objective of this test is to help me see what you can remember from previous genetics instruction. Please DO NOT research answers. I need to know what you currently know, not what you can google.
Your score will not count against you. You will not see if your answers are correct until after everyone has finished taking the pre-test, even after you submit. Thanks and give it your best try!
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Question 32
32.
In humans, the dimples allele is dominant and the non-dimples allele is recessive. A person who is homozygous recessive would create gametes that contain __________.
Question 33
33.
In humans, the dimples allele is dominant and the non-dimples allele is recessive. A person who is heterozygous would create gametes that contain __________.
Question 34
34.
A dihybrid cross can be done by drawing a punnett square containing __________ boxes.
Question 35
35.
A monohybrid cross can be done by drawing a punnett square containing __________ boxes.
Question 36
36.
A genetic cross that involves two characteristics is called a __________.
Question 37
37.
A genetic cross that involves only one characteristic is called a __________.
Question 38
38.
A table used to figure out the theoretical results of a genetic cross is called __________.
Question 39
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Question 40
40.
When choosing letters for the alleles in a monohybrid cross, you must choose a __________ for the recessive allele.
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Question 48
48.
Which of the following supports the claim that the environment can affect genetic traits?
Certain pine trees bear cones every other year.
Dandelion plants are self-pollinators.
Oak trees get taller as they grow.
Hydrangea flower color varies with soil pH.
Variation in human skin color is an example of
polygenic traits.
incomplete dominance.
multiple alleles.
codominance.
In rabbits, there are four different versions of the gene for fur color. What pattern of inheritance is this?
codominance
polygenic inheritance
multiple alleles
incomplete dominance
Situations in which one allele for a gene is not completely dominant over another allele for that gene are called
polygenic inheritance.
multiple genes.
multiple alleles.
incomplete dominance.
A breed of chicken shows codominance for feather color. One allele codes for black feathers, another codes for white feathers. The feathers of heterozygous chickens of this breed will be
gray.
black and white speckled.
white.
black.
Organisms that have two identical alleles for a particular trait are said to be
dominant.
homozygous.
heterozygous.
hybrid.
A heterozygous tall pea plant is crossed with a short plant. The probability that an F1 plant will be tall is
25%.
100%.
75%.
50%.
If a pea plant's alleles for height are "tt", what is true of its parents?
Both parents were short.
Both parents contributed a dominant allele.
Both parents contributed a recessive allele.
Both parents were tall.
When Gregor Mendel crossed a tall pea plant with a short pea plant, the F1 pea plants inherited
three alleles from each parent.
four alleles from each parent.
two alleles from each parent.
one allele from each parent.
The different forms of a gene are called
traits.
hybrids.
pollinations.
alleles.
Which of the following traits is controlled by multiple alleles in humans?
dimples
freckles
widow's peak
blood type
Tall (T) is dominant to short (t) in pea plants. Which of the following represents a genotype of a pea plant that is heterozygous for height?
Tt
T
TT
tt
An individual heterozygous for a trait and an individual homozygous recessive for the trait are crossed and produce offspring that are about 50/50 mix of
all the same genotype.
all the same phenotype.
of three different phenotypes.
of two different phenotypes.
The phenotype of an organism
is the physical appearance of a trait.
represents its genetic composition.
cannot be seen.
occurs only in dominant pure organisms.
The scientific study of heredity is called
meiosis.
genetics.
crossing-over.
pollination.
The passing of traits from parents to offspring is called
heredity.
development.
maturing.
genetics.
Genetics is the branch of biology that involves the study of how different traits are transmitted from one generation to the next.
True
False
Mendel discovered predictable patterns in the inheritance of traits.
True
False
Mendel's initial experiments were monohybrid crosses.
True
False
In Mendel's experiments, the recessive traits appeared in the F2 generation in approximately 25 percent of the plants.
True
False
A dominant allele masks the effect of a recessive allele.
True
False
Individuals must display a trait in order for it to appear in their offspring.
True
False
The allele for a recessive trait is usually represented by a capital letter.
True
False
Heterozygous individuals have two of the same alleles for a particular gene.
True
False
In heterozygous individuals, only the recessive allele is expressed.
True
False
A Punnett square represents the phenotype of an organism.
True
False
In codominance, two dominant alleles are expressed at the same time.
True
False
All genes have only two alleles.
True
False
A trait is a specific characteristic that can vary from one individual to another.
True
False
A trait in an unidentified plant is controlled by one gene that has two alleles. One allele is dominant over the other. According to Mendel’s principles, one fourth of the offspring made from a cross between two heterozygous plants will show the recessive trait.
True
False
For the trait of blood type in humans, there is an allele for Type A, an allele for Type B, and an allele for Type O. Each person inherits one of these alleles from each of their parents, and their blood type is determined by what combination of these alleles they receive. Blood type is inherited as a polygenic trait.
True
False
When writing a heterzygous genotype, you must
write the capital letter first
write the lower-case letter first
An organism's phenotype is the
physical or displayed trait
genetic code for a certain characteristic
DNA pattern
RNA pattern
Mendel chose pea plants because
they grow quickly.
they create large numbers of offspring.
they had a number of traits controlled by only two alleles.
all of the above were his reasons.
What is the term used to describe an individual when two different alleles are present (a hybrid)?
dominant
heterozygous
homozygous
recessive
What is the term used to describe an individual when two identical alleles are present (a purebreed)?
dominant
heterozygous
homozygous
recessive
The "weaker" of two alleles, only expressed if two alleles are present:
homozygous
recessive
heterozygous
dominant
The "stronger" of two alleles; it will get expressed even if only one allele is present:
homozygous
recessive
heterozygous
dominant
Which of the following statements are true?
Recessive genes always skip generations.
It is more likely that a dominant gene will be passed down if someone is heterozygous.
Dominant traits are always more common in a population.
Dominant genes are always passed down to the next generation.
None of these are true statements.
This man is referred to as the "Father of genetics":