BIO 101 PRACTICE TEST QUESTIONS AND ANSWERS WITH RATIONALES (VERIFIED ANSWERS) ALREADY GRADED A+
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Course
BIO 101
Institution
BIO 101
BIO 101 PRACTICE TEST QUESTIONS AND ANSWERS WITH RATIONALES (VERIFIED ANSWERS) ALREADY GRADED A+
Johann Gregor Mendel's work in genetics focused on traits that exhibit discontinuous variation. What kind of traits are these? - Answer-These are traits that are inherited in distinct patterns easily ...
BIO 101 PRACTICE TEST QUESTIONS AND
ANSWERS WITH RATIONALES (VERIFIED
ANSWERS) ALREADY GRADED A+
Johann Gregor Mendel's work in genetics focused on traits that exhibit discontinuous
variation. What kind of traits are these? - Answer-These are traits that are inherited in
distinct patterns easily distinguishable among phenotypes.
Mendel's hybridizations may best be described as which of the following? - Answer-The
matings of two true-breeding individuals that have different forms of the trait of interest.
Which best describes genotype and phenotype, respectively? - Answer-the structure of
the alleles and the outward appearance of the organism
The genetic makeup of an organism and its physical appearance are its and
, respectively. - Answer-genotype;phenotype
The process of crossover may be best defined as a process of genetic recombination
that occurs between - Answer-non-sister homologous chromatids in meiotic prophase I.
In pea plants, the allele for round peas (R) is dominant to the allele for wrinkled peas (r).
A gardener has a plant he got from his neighbor that produces round peas, but he does
not know its genotype. What simple procedure could he do to determine the genotype of
his new plant? - Answer-Perform a test cross with a plant that has wrinkled peas—if any
offspring give wrinkled peas, then the new plant's genotype is Rr.
A gardener received a pea plant from her neighbor, and she wants to know its
genotype. The neighbor told her it produces round peas, which is a dominant trait (R) to
wrinkled peas (r). The gardener performs a test cross and observes that half of the
offspring plants produce wrinkled peas. What is the genotype of the plant she received
from her neighbor? - Answer-homozygous dominant, RR
A gene can be best defined as which of the following? - Answer-a physical unit of
inheritance
The modern theory that explains Mendelian inheritance is called what? - Answer-
Chromosome Theory of Inheritance
During meiosis I, homologous chromosomes undergo chiasma formation. Which of the
following can happen now when the homologous chromosomes synapse or contact
each other? - Answer-homologous chromosomes exchange arms with one another via
homologous recombination
The number and appearance of a cell's chromosomes, including lengths, banding
patterns, and centromere positions, are collectively called what? - Answer-a karyotype
, Hemophilia is not seen in individuals heterozygous for the hemophilia gene. Thus, the
disease is: - Answer-recessive
The father of modern genetics was: - Answer-Mendel
How could you determine the distance between two genes using experimental matings?
- Answer-Look for the frequency of crossing over between the genes
Two genes located near each other on the same chromosomes are said to be: -
Answer-linked
Imagine that you are performing a cross involving seed color in garden pea plants. What
traits would you expect to observe in the F1 offspring if you cross true-breeding parents
with green seeds and yellow seeds? Yellow seed color is dominant over green. -
Answer-1:3 green seeds:yellow seeds
Imagine that you are performing a cross involving seed texture in garden pea plants.
You cross true-breeding round and wrinkled parents to obtain F1 offspring. Which of the
following experimental results in terms of numbers of plants are closest to what you
expect in the F2 progeny? - Answer-610:190 round seeds:wrinkled seedsa (3:1)
The observable traits expressed by an organism are described as its .-
Answer-phenotype
A recessive trait will be observed in individuals that are for that trait. -
Answer-homozygous
What are the types of gametes that can be produced by an individual with the genotype
AaBb? - Answer-AB, Ab, aB, ab
What is the reason for doing a test cross? - Answer-to identify heterozygous individuals
with the dominant phenotype
If black and white true-breeding mice are mated and the result is all gray offspring, what
inheritance pattern would this be indicative of? - Answer-incomplete dominance
In a cross between a homozygous red-eyed female fruit fly and a white-eyed male fruit
fly, what is the expected outcome? - Answer-all red-eyed offspring
When a population has a gene with four alleles circulating, how many possible
genotypes are there? - Answer-10
Which of the following is not a component of nucleotides, the building blocks of DNA? -
Answer-deoxyglucose
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