Pregunta 1
Pregunta
write the correct letter(s) for each mutation
[blank_start]w[blank_end] white eyes
[blank_start]y[blank_end] yellow body color
[blank_start]f[blank_end] forked bristles
[blank_start]B[blank_end] barred eyes
[blank_start]dp[blank_end] dumpy wings
[blank_start]vg[blank_end] vestigial (shriveled wings)
Pregunta 2
Pregunta
Which mutation(s) does this fruit fly possess? Include the letter designation.
Respuesta
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B
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Bar
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Dumpy
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dp
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White eyes
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w
Pregunta 3
Pregunta
Which mutation(s) does this fruit fly possess? Include the letter designation.
Respuesta
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Yellow
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y
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Vestigial
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vg
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White eyes
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w
Pregunta 4
Pregunta
Check all that describe the "wild type" fruit fly
Respuesta
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red eyes
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grey/tan body
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long, smooth wings
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smooth bristles
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forked bristles
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white eyes
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shriveled wings
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short wings
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yellow body
Pregunta 5
Pregunta
A fruit fly's bristles appear to diverge after a certain point so that one bristle has two ends. Which mutation(s) does this fruit fly possess? Include the letter designation.
Respuesta
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Forked
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f
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yw
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Yellow body-color
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Bar
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B
Pregunta 6
Pregunta
Which is male and which is female?
Pregunta 7
Pregunta
To pipette 250 uL of a solution, it is best to use a
Pregunta 8
Pregunta
A garden pea plant that has the genotype Rr for its smoothed pea phenotype is a ___________ plant and uses __________ to produce gametes.
Respuesta
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diploid; mitosis
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diploid; meiosis
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haploid, mitosis
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haploid; meiosis
Pregunta 9
Pregunta
A garden pea plant that has the genotype Rr for its smoothed pea phenotype is _____________ for the trait of pea shape, and is ____________ for the gene determining the pea-shaped trait.
Respuesta
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A true line; homozygous
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A true line; heterozygous
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Not a true line; homozygous
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Not a true line; heterozygous
Pregunta 10
Pregunta
The law of equal segregation predicts this garden pea plant will produce two different kinds of gametes, carrying either the R allele or the r allele as a result of separation of homologous chromosomes during [blank_start]anaphase I[blank_end].
Respuesta
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anaphase I
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anaphase II
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metaphase I
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metaphase II
Pregunta 11
Pregunta
When a garden pea plant that has the genotype Rr for its smoothed pea phenotype has a self-cross and generates F1 offspring generation, one would predict that [blank_start]75%[blank_end] of the offspring would produce smooth pea, and [blank_start]25%[blank_end] of the offspring would produce wrinkled pea.
Respuesta
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75%
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25%
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50%
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100%
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25%
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50%
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75%
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100%
Pregunta 12
Pregunta
Thomas Morgan was convinced Gregor Mendel's theory was correct because
Respuesta
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Charles Darwin said so
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he could match the white gene mutation on the X chromosome in Drosophila
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He found polytene chromosome banding patterns in Drosophila
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He recognized Frances Crick and James Wason's double helix structure of DNA
Pregunta 13
Pregunta
The Drosophila hedgehog (hh) gene was discovered in the 1980s. It is an important gene that encodes a secreted protein to regulate limb formation. Which of the statements below is incorrect?
Respuesta
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The fly hh mutants would likely show phenotype on fly wings
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The fly hh mutants would likely show the phenotype on fly eyes
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The hh gene is unique to Drosophila, no other animals have hh gene or its homolog
Pregunta 14
Pregunta
The white gene is located on the X chromosome. There are [blank_start]1[blank_end] copy(ies) of white gene in a cell of a male fly and [blank_start]2[blank_end] copy(ies) in a cell of a female fly.
Pregunta 15
Pregunta
In describing the timing of Drosophila development, researchers use AEL to mean "After egg-laying" , for example, 40 h AEL means 40 hours afer egg laying. At 25 degrees C, a fruit fly of 75h AEL is in:
Respuesta
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Embryonic stage
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Larval stage
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Pupal stage
Pregunta 16
Pregunta
Peter identified that a gray body colored mutant fly is due to X-linked mutation, and the gray body color is a recessive phenotype. Which option below illustrates the proper way to write the genotype of such gray color mutant male fly when the symbol "G" illustrates the wild type allele and "g" the mutant allele?
Respuesta
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Gg
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gg
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X^G X^g
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X^G Y
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X^g Y
Pregunta 17
Pregunta
When a female fly with recessive X-linked gray body color mates with a male fly with wild type body color, which of the following would Peter observe?
Respuesta
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All offspring have wild type body color
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All offspring have gray body color
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All female offspring have wild type body color, and all male offspring have gray body color
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All male offspring have wild type body color, and all female offspring have gray body color.
Pregunta 18
Pregunta
Normally a male of Aa genotype would produce sperms with genotype(s) of A or a. Occasionally non-disjunction happens during meiosis I of spermatogenesis and consequently results in sperm with genotype(s) of...
Pregunta 19
Pregunta
The mating of an Aa male and an aa female produced an offspring with the genotype AAa. Therefore, the resulting offspring has 3 copies of gene 1 (trisomy for Chromosome 1). At what stage during meiosis did the non-disjunction event occur and in which parent? Check all of the options that apply
Respuesta
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Paternal non-disjunction in meiosis I
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Maternal non-disjunction in meiosis I
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Paternal non-disjunction in meiosis II
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Maternal non-disjunction in meiosis II
Pregunta 20
Pregunta
The mating of an Aa male and an aa female produced an offspring with the genotype aaa. Therefore, the resulting offspring has 3 copies of gene 1 (trisomy for Chromosome 1). At what stage during meiosis did the non-disjunction event occur and in which parent? Check all of the answers that apply.
Respuesta
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Paternal non-disjunction in Meiosis I
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Maternal non-disjunction in Meiosis I
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Paternal non-disjunction in Meiosis II
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Maternal non-disjunction in Meiosis II