hemophilia B follows an X-linked recessiev mode of inheritance with complete penetrance. A phenotypically normal couple has a hemophilic child with Turner syndrome. in whichc parent/phase of meiosis could nondisjunction have occurred to give rise to this child:_________

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10-11-2019
Biology

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hemophilia B follows an X-linked recessiev mode of inheritance with complete penetrance. A phenotypically normal couple has a hemophilic child with Turner syndrome. in whichc parent/phase of meiosis could nondisjunction have occurred to give rise to this child:_________

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mashegosililo mashegosililo · Answer 1 · 2019-11-10T09:57:14+01:00

Answer: The female is a carrier for hemophila, since the parents are phenotypically normal and The Turners syndrome is caused by an error which caused the missing chromosome to dissapear duting oogenesis (egg prodiction) or spermatogenesis (sperm production)

Explanation:

Hemophila is an X-linked recessive disease an in this case has complete penetrance ie. The phenotype will be expressed.

Here the parents do not express hemophilia thus indicating that the mother (this is an X-like recessive disease) expressess hemophila on the recessive X chromosome

Turners Syndrome is caused by chromosomal non-disjunction during oogenesis or spermatogenesis.