Questão 1
Questão
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)
Questão 2
Questão
Which mutation(s) does this fruit fly possess? Include the letter designation.
Responda
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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
Questão 3
Questão
Which mutation(s) does this fruit fly possess? Include the letter designation.
Responda
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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
Questão 4
Questão
Check all that describe the "wild type" fruit fly
Responda
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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
Questão 5
Questão
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.
Responda
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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
Questão 6
Questão
Which is male and which is female?
Questão 7
Questão
To pipette 250 uL of a solution, it is best to use a
Questão 8
Questão
A garden pea plant that has the genotype Rr for its smoothed pea phenotype is a ___________ plant and uses __________ to produce gametes.
Responda
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diploid; mitosis
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diploid; meiosis
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haploid, mitosis
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haploid; meiosis
Questão 9
Questão
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.
Responda
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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
Questão 10
Questão
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].
Responda
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anaphase I
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anaphase II
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metaphase I
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metaphase II
Questão 11
Questão
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.
Responda
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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%
Questão 12
Questão
Thomas Morgan was convinced Gregor Mendel's theory was correct because
Responda
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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
Questão 13
Questão
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?
Responda
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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
Questão 14
Questão
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.
Questão 15
Questão
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:
Responda
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Embryonic stage
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Larval stage
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Pupal stage
Questão 16
Questão
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?
Responda
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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
Questão 17
Questão
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?
Responda
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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.
Questão 18
Questão
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...
Questão 19
Questão
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
Responda
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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
Questão 20
Questão
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.
Responda
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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