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WorksheetsTrivia Game: Genetics
Total questions: 20
Worksheet time: 13mins
What do we mean when we use the terms monohybrid cross and dihybrid cross?
A monohybrid cross involves a single parent, whereas a dihybrid cross involves two parents.
A monohybrid cross produces a single progeny, whereas a dihybrid cross produces two progeny.
A dihybrid cross involves organisms that are heterozygous for two characters and a monohybrid cross involves only one.
D) A monohybrid cross is performed for one generation, whereas a dihybrid cross is performed for two generations.
E) A monohybrid cross results in a 9:3:3:1 ratio whereas a dihybrid cross gives a 3:1 ratio.
Why did the F1 offspring of Mendel's classic pea cross always look like one of the two parental varieties?
No genes interacted to produce the parental phenotype.
Each allele affected phenotypic expression.
The traits blended together during fertilization.
One phenotype was completely dominant over another.
Different genes interacted to produce the parental phenotype.
Mendel's observation of the segregation of alleles in gamete formation has its basis in which of the following phases of cell division?
prophase I of meiosis
anaphase II of meiosis
metaphase I of meiosis
anaphase I of meiosis
anaphase of mitosis
Which of the following describes the ability of a single gene to have multiple phenotypic effects?
incomplete dominance
multiple alleles
pleiotropy
epistasis
Cystic fibrosis affects the lungs, the pancreas, the digestive system, and other organs, resulting in symptoms ranging from breathing difficulties to recurrent infections. Which of the following terms best describes this?
incomplete dominance
multiple alleles
pleiotropy
epistasis
codominance
What was the most significant conclusion that Gregor Mendel drew from his experiments with pea plants?
There is considerable genetic variation in garden peas.
Traits are inherited in discrete units, and are not the results of "blending."
Recessive genes occur more frequently in the F1 generation than do dominant ones.
Genes are composed of DNA.
An organism that is homozygous for many recessive traits is at a disadvantage.
What is an allele?
the recessive form of a gene
the dominant form of a gene
an alternative version of a gene
a variety of pea plant used by Mendel
a type of chromosome
How many unique gametes could be produced through independent assortment by an individual with the genotype AaBbCCDdEE?
4
8
16
64
Which of the following statements about independent assortment and segregation is correct?
The law of segregation requires describing two or more genes relative to one another.
The law of independent assortment requires describing two or more genes relative to one another.
The law of segregation is accounted for by anaphase of mitosis.
The law of independent assortment is accounted for by observations of prophase I.
A sexually reproducing animal has two unlinked genes, one for head shape (H) and one for tail length (T). Its genotype is HhTt. Which of the following genotypes is possible in a gamete from this organism?
T
HhTt
HT
Hh
You cross a true-breeding red-flowered snapdragon with a true-breeding white-flowered one. All of the F1 are pink. What does this say about the parental traits?
Pink is dominant, and red and white are recessive.
Red is completely dominant.
Red shows incomplete dominance over white.
Both red and white are pleiotropic.
Height in humans generally shows a normal (bell-shaped) distribution. What type of inheritance most likely determines height?
a combination of multiple alleles and codominance
incomplete dominance
a combination of polygenic inheritance and environmental factors
a combination of epistasis and environmental factors
a combination of complete dominance and environmental factors
The centromere is a region in which
chromatids remain attached to one another until anaphase
metaphase chromosomes become aligned at the metaphase plate
chromosomes are grouped during telophase
the nucleus is located prior to mitosis
new spindle microtubles form at either end
Asexual reproduction results in identical offspring unless which of the following occurs?
Natural selection
Cloning
Crossing over
Mutation
Environmental change
The human genome is minimally contained in which of the following?
Every human cell
Each human chromosome
The entire DNA of a single human
The entire human population
Each human gene
A gene's location is along a chromosome is known as which of the following?
Allele
Sequence
Locus
Variant
Trait
At which stage of mitosis are chromosomes usually photographed in the preparation of a karyotype?
Prophase
Metaphase
Anaphase
Telophase
Interphase
The human X and Y chromosomes
are both present in every somatic cell of males and females alike
are of approximately equal size and number of genes
are almost entirely homologous, despite their different names
include genes that determine an individual's sex
include only gametes that govern sex determination
In animals, meiosis results in gametes, and fertilization results in
spores
gametophytes
zygotes
sporophytes
clones
Centromeres of sister chromatids disjoin and chromatids separate
Metaphase I
Anaphase I
Telophase I
Prophase II
Anaphase II
