17.3 Flashcards

1
Q

sickle cell anemia

A

first human disease shwon the be the result of a mutation in a protein
-caused by a defect in hemoglobin

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2
Q

nondisjunctuion changes chromosome number

A

nondisjunction: failure of homologues or sister chromatids to seperate properly during meioisis
leads to aneuploidy (gain or loss of a chromsome)
monosomy= chromsome loss
trisomy= chromosome gain
anueploid human embryouys rarely development

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3
Q

trisomy 21: down syndrome

A

may be a complete extra copy of chromosme 21
may be a translocation of key part of chromomsoe 21
mothers age infleunces risk

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4
Q

nondisjunction sex chromosomes

A

does not generally produce severe developmental abnormalities
may cause somewhat abnormal features, but many reach maturity

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5
Q
A
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