ws the dark pigment nin to be produced in a her, displaying complete inance. een Phenotype depends on gene B BB Bb bb pied aa yellow yellow means pigment cells cannot produce the dark pigment melanin if homozygous. Gene B is a patterning gene that controls the expression of Gene A. Gene B has a codominant inheritance pattern. Genotype BB expresses (turns on) gene A in all feather pigment cells. Genotype bb fails to turn gene A on in any feathers. Genotype Bb turns gene A on in pigment cells of some feathers but not others. mage color in canaries is in part controlled by 2 unlinked genes that display epistasis: ne A codes for an enzyme involved in the manufacture of the dark pigment melanin. A recessive allele that displays a mplete dominance pattern of inheritance fails to produce melanin. ne B is a patterning gene, whose protein product interacts with gene A epistatically. It too has a recessive allele that vents the expression of gene A, resulting in a yellow feather, regardless of the allele present for gene A. Gene B acts in a dominant fashion, where in heterozygous individuals the dominant allele is expressed in some feathers, while the recessive le is expressed in others. take a true-breeding green canary and cross it with a yellow canary of unknown genotype. After many crosses of se two parents you obtain many dozen offspring of which some are green and some are pied. No offspring are yellow, and ir sample size of offspring is large enough to convince you that these two parental canaries have genotypes that are not e to produce yellow offspring. owing how plumage color is inherited in canaries, and knowing the outcome of this cross, what is the genotype of the yellow ent?
ws the dark pigment nin to be produced in a her, displaying complete inance. een Phenotype depends on gene B BB Bb bb pied aa yellow yellow means pigment cells cannot produce the dark pigment melanin if homozygous. Gene B is a patterning gene that controls the expression of Gene A. Gene B has a codominant inheritance pattern. Genotype BB expresses (turns on) gene A in all feather pigment cells. Genotype bb fails to turn gene A on in any feathers. Genotype Bb turns gene A on in pigment cells of some feathers but not others. mage color in canaries is in part controlled by 2 unlinked genes that display epistasis: ne A codes for an enzyme involved in the manufacture of the dark pigment melanin. A recessive allele that displays a mplete dominance pattern of inheritance fails to produce melanin. ne B is a patterning gene, whose protein product interacts with gene A epistatically. It too has a recessive allele that vents the expression of gene A, resulting in a yellow feather, regardless of the allele present for gene A. Gene B acts in a dominant fashion, where in heterozygous individuals the dominant allele is expressed in some feathers, while the recessive le is expressed in others. take a true-breeding green canary and cross it with a yellow canary of unknown genotype. After many crosses of se two parents you obtain many dozen offspring of which some are green and some are pied. No offspring are yellow, and ir sample size of offspring is large enough to convince you that these two parental canaries have genotypes that are not e to produce yellow offspring. owing how plumage color is inherited in canaries, and knowing the outcome of this cross, what is the genotype of the yellow ent?
Chapter7: The Challenge Of phlebotomy
Section: Chapter Questions
Problem 2RQ
Related questions
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Transcribed Image Text:Dominant allele of gene A
allows the dark pigment
melanin to be produced in a
feather, displaying complete
dominance.
green
BB
Ay
Phenotype
depends on
gene B
Pigment-
producing
cell
Bb bb
pied
aa
yellow
yellow
Recessive allele of gene A
means pigment cells cannot
produce the dark pigment
melanin if homozygous.
Gene B is a patterning gene that
controls the expression of Gene
A. Gene B has a codominant
inheritance pattern. Genotype
BB expresses (turns on) gene A in
all feather pigment cells.
Genotype bb fails to turn gene A
on in any feathers. Genotype Bb.
turns gene A on in pigment cells
of some feathers but not others.
Plumage color in canaries is in part controlled by 2 unlinked genes that display epistasis:
Gene A codes for an enzyme involved in the manufacture of the dark pigment melanin. A recessive allele that displays a
complete dominance pattern of inheritance fails to produce melanin.
Gene B is a patterning gene, whose protein product interacts with gene A epistatically. It too has a recessive allele that
prevents the expression of gene A, resulting in a yellow feather, regardless of the allele present for gene A. Gene B acts in a
co-dominant fashion, where in heterozygous individuals the dominant allele is expressed in some feathers, while the recessive
allele is expressed in others.
You take a true-breeding green canary and cross it with a yellow canary of unknown genotype. After many crosses of
these two parents you obtain many dozen offspring of which some are green and some are pied. No offspring are yellow, and
your sample size of offspring is large enough to convince you that these two parental canaries have genotypes that are not
able to produce yellow offspring.
Knowing how plumage color is inherited in canaries, and knowing the outcome of this cross, what is the genotype of the yellow
parent?
Transcribed Image Text:Select one:
a. Aa Bb
Ob. aa BB
O c.
A_ bb
Od. AA bb Aa bb
e.
O f.
aa B_
aa Bb
g. aa bb
Your answer is incorrect.
try again
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