2. Dosage compensation in mammals typically involves the random inactivation of one of the two X chromosomes relatively early in development. Such X-chromosome inactivation often leads to phenotypic mosaicism. Assume that black fur in cats is due to the X-linked recessive gene b, while its dominant allele B produces yellow fur. A XBXb heterozygote is a mosaic called "tortoise shell" or "calico." Using appropriate gene symbols, diagram a mating between a black male and a "calico" female. Give the phenotypes and genotypes of all the offspring. nieslqayb lamsboros oitobidan diw limst a bodineob niwed ashed) A vino diw odiagot modet gwe

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2. Dosage compensation in mammals typically involves the random inactivation of one
of the two X chromosomes relatively early in development. Such X-chromosome
inactivation often leads to phenotypic mosaicism. Assume that black fur in cats is due to
the X-linked recessive gene b, while its dominant allele B produces yellow fur. A XBXb
heterozygote is a mosaic called "tortoise shell" or "calico." Using appropriate gene
symbols, diagram a mating between a black male and a "calico" female. Give the
phenotypes and genotypes of all the offspring.
sizslqayb famroboros oitobidan diw limst a boditeob niwie eslind.2781 1.1
A vino diw odiagot nodes ewaj diod ni bodeirul oredw noionog ni nom no
oved botools audi nom od 21slom 1oisicoq & diw ban diset 10eioni Anow ban leme
on terlt oldedusmon zi sl...stil ni vhes blad omoosd bus vbod srh no nie sla
1 16 215gab ediriguodilA...botoofts gnisd striguab sto bonusoo and somani
noe sto bonusso end sess on basenoz isdt of vonsbast sdi rimanen yod borosifs
"artoz zid of li gainimerud
10 leme diw botoofts viblim she aslamst omoz.19b10eib on diw zsilimst Isnoisibba al
3. The sex of birds, some insects, and other organisms is determined by a ZWonnollem
chromosomal arrangement. (remember what the ZW indicates) Assume that a recessive
lethal allele on the Z chromosome causes death of an embryo in birds. What sex ratio is
would result in the offspring if a cross were made between a male heterozygous for the
lethal allele and a normal female?
ai sonsinsdnl to sboM.A
Ung
11:asood
930043
574
oitonbirns ethnodai amotqmye ydoteq asd odw nemow s to nos & tad viilidsdon T
ai cizalqayb larmobots
Sion vw to vdW Sbotimil-xsa q tons 21.8
990
Sod bloow ains
to zoquionsg oldizzoq .slam borosite naved of namow 8 10
Transcribed Image Text:2. Dosage compensation in mammals typically involves the random inactivation of one of the two X chromosomes relatively early in development. Such X-chromosome inactivation often leads to phenotypic mosaicism. Assume that black fur in cats is due to the X-linked recessive gene b, while its dominant allele B produces yellow fur. A XBXb heterozygote is a mosaic called "tortoise shell" or "calico." Using appropriate gene symbols, diagram a mating between a black male and a "calico" female. Give the phenotypes and genotypes of all the offspring. sizslqayb famroboros oitobidan diw limst a boditeob niwie eslind.2781 1.1 A vino diw odiagot nodes ewaj diod ni bodeirul oredw noionog ni nom no oved botools audi nom od 21slom 1oisicoq & diw ban diset 10eioni Anow ban leme on terlt oldedusmon zi sl...stil ni vhes blad omoosd bus vbod srh no nie sla 1 16 215gab ediriguodilA...botoofts gnisd striguab sto bonusoo and somani noe sto bonusso end sess on basenoz isdt of vonsbast sdi rimanen yod borosifs "artoz zid of li gainimerud 10 leme diw botoofts viblim she aslamst omoz.19b10eib on diw zsilimst Isnoisibba al 3. The sex of birds, some insects, and other organisms is determined by a ZWonnollem chromosomal arrangement. (remember what the ZW indicates) Assume that a recessive lethal allele on the Z chromosome causes death of an embryo in birds. What sex ratio is would result in the offspring if a cross were made between a male heterozygous for the lethal allele and a normal female? ai sonsinsdnl to sboM.A Ung 11:asood 930043 574 oitonbirns ethnodai amotqmye ydoteq asd odw nemow s to nos & tad viilidsdon T ai cizalqayb larmobots Sion vw to vdW Sbotimil-xsa q tons 21.8 990 Sod bloow ains to zoquionsg oldizzoq .slam borosite naved of namow 8 10
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