Pedigree Studies (Leaving Cert Biology): Flashcards
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Practise the cards
11 cards from this deck
Purpose of pedigree studies
Purpose of pedigree studies
Trace inheritance of traits/disorders through family generations
Symbol for males in pedigree charts
Symbol for males in pedigree charts
Squares
Symbol for females in pedigree charts
Symbol for females in pedigree charts
Circles
Red/shaded shapes in pedigree charts mean
Red/shaded shapes in pedigree charts mean
Affected individuals
Half-red circles in pedigree charts mean
Half-red circles in pedigree charts mean
Carrier females (carry gene but don't show disorder)
Blue/unshaded shapes in pedigree charts mean
Blue/unshaded shapes in pedigree charts mean
Unaffected (normal) individuals
X-linked recessive: which sex more affected?
X-linked recessive: which sex more affected?
Males
Can females be carriers in X-linked recessive?
Can females be carriers in X-linked recessive?
Yes, without being affected
Do affected males pass X-linked disorder to sons?
Do affected males pass X-linked disorder to sons?
No
What happens to daughters of affected males (X-linked)?
What happens to daughters of affected males (X-linked)?
All become carriers
Through whom is X-linked recessive gene passed?
Through whom is X-linked recessive gene passed?
Carrier females