34311571
Descripción
Test por dumb himbo, actualizado hace más de 1 año
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Creado por dumb himbo
hace más de 2 años
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Pregunta 1
Pregunta
An organism’s ________________ is determined by its _________________.
Respuesta
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Genotype; phenotype
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Phenotype; genotype
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Allele; phenotype
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F1 generation; allele
Pregunta 2
Pregunta
What are Barr bodies?
Respuesta
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X chromosomes inactivated to prevent over-expression of the alleles found on the X chromosome in females
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Highly condensed Y chromosomes in males
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X chromosomes inactivated to allow for expression of the males-specific phenotype
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Inactive autosomal chromosomes specific to females
Pregunta 3
Pregunta
If one strand of a DNA molecule has the sequence ATTGCAT, then the complementary strand will have the sequence
Respuesta
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ATTGCAT
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TACGTTA
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TAACGTA
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GCCTAGC
Pregunta 4
Pregunta
What is the central dogma of molecular biology?
Respuesta
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DNA is the genetic material.
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Information passes from DNA to protein.
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Information passes from DNA to RNA to protein
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One gene encodes only one polypeptide
Pregunta 5
Pregunta
Nondisjunction results in
Respuesta
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An improper number of chromosomes
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aneuploidy
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None of the above
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Both a and b above
Pregunta 6
Pregunta
The principle that states that two alleles for a gene separate during gamete formation and are rejoined at random, one from each parent during fertilization is called
Respuesta
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Mendel’s second law of heredity
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The principle of segregation
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Law of independent assortment
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Mendel’s third law of heredity
Pregunta 7
Pregunta
When more than one gene affects a trait, this is known as ____________ and an example of this can be found with _______________.
Respuesta
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Pleiotropy; eye color
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Incomplete dominance; hairline
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Polygenic inheritance; eye color
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Codominance; sex-linked disorders
Pregunta 8
Pregunta
In certain flowers, the heterozygous condition is displayed as an intermediate phenotype between the two homozygous conditions. For example, crossing red snapdragons with white snapdragons produces pink snapdragons. This is an example of:
Respuesta
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Incomplete dominance
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Codominance
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Segregation
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Epistasis
Pregunta 9
Pregunta
Nondisjunction of the sex chromosomes is much more likely to occur in women than in men because
Respuesta
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this is not true; nondisjunction occurs equally in men and women
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Women have two X chromosomes to the one X chromosome in men
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Women’s eggs have developed prior to birth while men form new sperm cells daily and so the eggs are much older.
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It is carried on the X chromosome
Pregunta 10
Pregunta
If an organism’s DNA is known to be composed of 23% adenine, what percentage of their DNA would be composed of guanine?
Respuesta
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27%
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23%
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Unable to determine from the data given
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46%
Pregunta 11
Pregunta
The process in which DNA is used as a template to form another DNA molecule is called
Respuesta
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Transcription
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Reverse transcription
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Replication
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Translation
Pregunta 12
Pregunta
In addition to adding bases to the growing DNA strand during replication, DNA polymerase is also responsible for
Respuesta
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Proofreading the new DNA molecule as it is being synthesized
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Synthesizing RNA
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Making proteins
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DNA polymerase has only the one function
Pregunta 13
Pregunta
DNA is always synthesized in the __________ direction and because of this, the lagging strand is synthesized ______________, forming Okazaki fragments.
Respuesta
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3’-5’; discontinuously
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3’-5’; continuously
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5’-3”; discontinuously
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5’-3’; continuously
Pregunta 14
Pregunta
Some errors that may occur during DNA replication may be repaired. The type of repair that does not require the presence of light is known as:
Respuesta
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Photorepair
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Mutagen repair
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Radiation
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Excision repair
Pregunta 15
Pregunta
What is added to eukaryotic transcripts following transcription
Respuesta
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5’ cap and a 3’ poly A tail
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3’ cap and a 5’ poly A tail
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5’ hat and a 3’ poly B tail
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3’ bonnet and a 5’ poly A tail
Pregunta 16
Pregunta
Where does translation occur in eukaryotes?
Respuesta
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In the nucleus
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In the golgi apparatus
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On the ribosomes
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In a vacuole
Pregunta 17
Pregunta
A mutation that alters a single base but does not alter the amino acid that is coded for is called a _________ mutation.
Respuesta
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Missense
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Silent
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Nonsense
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noisy
Pregunta 18
Pregunta
Which of the following is a good example of epistasis?
Respuesta
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red and white snapdragons are bred and the offspring are pink
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Himalayan rabbits produce temperature-sensitive products
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when mice have one copy of the spinning gene they spin but with two copies, they die.
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E gene determines fur color of Labrador retrievers and the B gene determines the darkness of the pigment
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