{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

G trisomy 21 small is well tolerated but

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: e.g., trisomy 21 (small) is well tolerated, but abnormalities still result. Trisomy 13 and 18 are the only other trisomies recorded to survive in utero 4 Trisomy 13 usually die shortly after. baby looks fairly normal - count toes though. all the organs are abnormal 5 Trisomy 18 isn’t the baby’s karyotype.. internal organs 6 Trisomy 21 7 in germ tissue. only looking at 21. all other chromosomes are working normally e.g. chromosome 21 didn’t separate, so all chromosomes are in one cell Fertilization 21 Trisomy Monosomy Normal (2n) 8 Trisomy Monosomy Aneuploidy Aneuploidy for the X chromosome Humans: XY male, XX female -must have at least one X for viability → gene dosage Gene dosage is the number of copies of a gene present in a cell -need dosage of one for most genes on X chromosome 9 Aneuploidy Aneuploidy for the X chromosome What about females? XX -...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online