lorraine
Forum Newbie
Topics: 2
Posts: 2
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i'm struggling in biology and need some desperate help ASAP.
Judy marries Al and they have children. Judys father was affected by Phenylketonuria.( an autosomal recessive disorder) causing inability to degrade the amino acid phenylalanine,(but her mother was normal. Al's parents were normal. List the probable geneotypes of all persons and diagram the cross. including the gametes they form. what is the probablity that any given child they have will be 1)normal 2) a carrier 3) or have the disease.
please help
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| 99doc
Forum Elite
Topics: 52
Posts: 370
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judy Al-PP
Pp(p-def gene
P- normal gene)
pP*PP
pP, pP, PP, PP.
2 are normal out of 4 so 50% normal
carrier will be 2 that is 50%
the progeny can't have disease as for AR disease def gene must be present in both parents.
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| kingsofke
Forum Guru
Topics: 24
Posts: 715
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what about the carrier status of judy's mother and AL's parents
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| 99doc
Forum Elite
Topics: 52
Posts: 370
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in case of judy they have given the hint for his carrier status.but not so in case of his mother or AL's parents assuming that they are both phenotypically & genotypically normal.
i think this way.
but if u want to take them as carriers u can go for it & get the genotypes likewise.
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